9-letter words ending with M
Dive into the specific realm of 9-letter words that conclude with the letter M. This focused section reveals the fascinating ways in which words of this particular length, ending with M, contribute to the richness of the English language. Whether it's for expanding your vocabulary, solving puzzles, or simply for the love of words, discover how these terms uniquely blend length and ending sound.
| Word | Points | Definition | Sentence example |
|---|---|---|---|
| terrorism | 11 | the calculated use of violence (or the threat of violence) against civilians in order to attain goals that are political or religious or ideological in nature; this is done through intimidation or coercion or instilling fear | - |
| classroom | 13 | a room in a school where lessons take place | - |
| courtroom | 13 | a room in which a lawcourt sits | television cameras were admitted in the courtroom |
| transform | 14 | change or alter in form, appearance, or nature | This experience transformed her completely |
| mechanism | 18 | the atomic process that occurs during a chemical reaction | he determined unique mechanisms for the photochemical reactions |
| criticism | 15 | disapproval expressed by pointing out faults or shortcomings | the senator received severe criticism from his opponent |
| communism | 17 | a form of socialism that abolishes private ownership | - |
| socialism | 13 | an economic system based on state ownership of capital | - |
| storeroom | 11 | a room in which things are stored | - |
| plutonium | 13 | a solid silvery grey radioactive transuranic element whose atoms can be split when bombarded with neutrons; found in minute quantities in uranium ores but is usually synthesized in nuclear reactors; 13 isotopes are known with the most important being plutonium 239 | - |
| vandalism | 15 | willful wanton and malicious destruction of the property of others | - |
| petroleum | 13 | a dark oil consisting mainly of hydrocarbons | - |
| continuum | 13 | a continuous nonspatial whole or extent or succession in which no part or portion is distinct or distinguishable from adjacent parts | - |
| ecosystem | 16 | a system formed by the interaction of a community of organisms with their physical environment | - |
| potassium | 13 | a light soft silver-white metallic element of the alkali metal group; oxidizes rapidly in air and reacts violently with water; is abundant in nature in combined forms occurring in sea water and in carnallite and kainite and sylvite | - |
| gymnasium | 17 | athletic facility equipped for sports or physical training | - |
| mausoleum | 13 | a large burial chamber, usually above ground | - |
| ultimatum | 13 | a final peremptory demand | - |
| symbolism | 18 | the practice of investing things with symbolic meaning | - |
| diaphragm | 18 | a contraceptive device consisting of a flexible dome-shaped cup made of rubber or plastic; it is filled with spermicide and fitted over the uterine cervix | - |
| magnesium | 14 | a light silver-white ductile bivalent metallic element; in pure form it burns with brilliant white flame; occurs naturally only in combination (as in magnesite and dolomite and carnallite and spinel and olivine) | - |
| magnetism | 14 | the branch of science that studies magnetism | - |
| cataclysm | 18 | a sudden violent change in the earth's surface | - |
| pseudonym | 17 | a fictitious name used when the person performs a particular social role | - |
| euphemism | 18 | an inoffensive or indirect expression that is substituted for one that is considered offensive or too harsh | - |
| snowstorm | 14 | a storm with widespread snowfall accompanied by strong winds | - |
| reprogram | 14 | - | - |
| algorithm | 15 | a precise rule (or set of rules) specifying how to solve some problem | - |
| symposium | 18 | a meeting or conference for the public discussion of some topic especially one in which the participants form an audience and make presentations | - |
| overwhelm | 20 | charge someone with too many tasks | - |
| martyrdom | 17 | any experience that causes intense suffering | - |
| pentagram | 14 | a star with 5 points; formed by 5 straight lines between the vertices of a pentagon and enclosing another pentagon | - |
| boardroom | 14 | a room where a committee meets (such as the board of directors of a company) | - |
| styrofoam | 17 | a light resilient foam of polystyrene | - |
| catechism | 18 | an elementary book summarizing the principles of a Christian religion; written as questions and answers | - |
| earthworm | 17 | terrestrial worm that burrows into and helps aerate soil; often surfaces when the ground is cool or wet; used as bait by anglers | - |
| cloakroom | 17 | a room where coats and other articles can be left temporarily | - |
| mysticism | 18 | a religion based on mystical communion with an ultimate reality | - |
| conundrum | 14 | a difficult problem | - |
| eroticism | 13 | a state of anticipation of sexuality | - |
| harmonium | 16 | a free-reeded instrument with a piano keyboard in which air is forced through the reeds by bellows | - |
| rainstorm | 11 | a storm with rain | - |
| aluminium | 13 | a silvery ductile metallic element found primarily in bauxite | - |
| barbarism | 15 | a brutal barbarous savage act | - |
| modernism | 14 | the quality of being current or of the present | - |
| microfilm | 18 | film on which materials are photographed at greatly reduced size; useful for storage; a magnification system is used to read the material | - |
| sugarplum | 14 | any of various small sugary candies | - |
| stockroom | 17 | storeroom for storing goods and supplies used in a business | - |
| microcosm | 17 | a miniature model of something | - |
| sandstorm | 12 | a windstorm that lifts up clouds of dust or sand | - |
| hypnotism | 19 | the act of inducing hypnosis | - |
| firestorm | 14 | an outburst of controversy | the incident triggered a political firestorm |
| masochism | 18 | sexual pleasure obtained from receiving punishment (physical or psychological) | - |
| colosseum | 13 | a large amphitheater in Rome whose construction was begun by Vespasian about AD 75 or 80 | - |
| ectoplasm | 15 | (spiritualism) a substance supposed to emanate from the body of the medium during a trance | - |
| pessimism | 15 | a general disposition to look on the dark side and to expect the worst in all things | - |
| maelstrom | 13 | a powerful circular current of water (usually the result of conflicting tides) | - |
| hailstorm | 14 | a storm during which hail falls | - |
| milligram | 14 | one thousandth (1/1,000) gram | - |
| extremism | 20 | any political theory favoring immoderate uncompromising policies | - |
| bacterium | 15 | (microbiology) single-celled or noncellular spherical or spiral or rod-shaped organisms lacking chlorophyll that reproduce by fission; important as pathogens and for biochemical properties; taxonomy is difficult; often considered to be plants | - |
| zirconium | 22 | a lustrous grey strong metallic element resembling titanium; it is used in nuclear reactors as a neutron absorber; it occurs in baddeleyite but is obtained chiefly from zircon | - |
| lorazepam | 22 | tranquilizer (trade name Ativan) used to treat anxiety and tension and insomnia | - |
| mammogram | 18 | X-ray film of the soft tissue of the breast | - |
| guestroom | 12 | a bedroom that is kept for the use of guests | - |
| palladium | 14 | a silver-white metallic element of the platinum group that resembles platinum; occurs in some copper and nickel ores; does not tarnish at ordinary temperatures and is used (alloyed with gold) in jewelry | - |
| therefrom | 17 | from that circumstance or source | public interest and a policy deriving therefrom |
| subsystem | 16 | a system that is part of some larger system | - |
| cuneiform | 16 | shaped like a wedge | - |
| angiogram | 13 | an X-ray representation of blood vessels made after the injection of a radiopaque substance | angiograms are produced by angiography |
| terrarium | 11 | a vivarium in which selected living plants are kept and observed | - |
| vampirism | 18 | belief in the existence of vampires | - |
| despotism | 14 | a form of government in which the ruler is an absolute dictator (not restricted by a constitution or laws or opposition etc.) | - |
| wherefrom | 20 | - | - |
| lunchroom | 16 | a restaurant (in a facility) where lunch can be purchased | - |
| mannerism | 13 | a deliberate pretense or exaggerated display | - |
| defeatism | 15 | acceptance of the inevitability of defeat | - |
| pachyderm | 22 | any of various nonruminant hoofed mammals having very thick skin: elephant; rhinoceros; hippopotamus | - |
| voyeurism | 17 | a perversion in which a person receives sexual gratification from seeing the genitalia of others or witnessing others' sexual behavior | - |
| solipsism | 13 | (philosophy) the philosophical theory that the self is all that you know to exist | - |
| stateroom | 11 | a guest cabin | - |
| stratagem | 12 | an elaborate or deceitful scheme contrived to deceive or evade | - |
| crossbeam | 15 | a horizontal beam that extends across something | - |
| airstream | 11 | the flow of air that is driven backwards by an aircraft propeller | - |
| volcanism | 16 | the phenomena associated with volcanic activity | - |
| radiogram | 13 | a photographic image produced on a radiosensitive surface by radiation other than visible light (especially by X-rays or gamma rays) | - |
| fetishism | 17 | sexual arousal or gratification resulting from handling a fetish (or a specific part of the body other than the sexual organs) | - |
| presidium | 14 | a permanent executive committee in socialist countries that has all the powers of some larger legislative body and that acts for it when it is not in session | - |
| logarithm | 15 | the exponent required to produce a given number | - |
| guardroom | 13 | a cell in which soldiers who are prisoners are confined | - |
| greenroom | 12 | a backstage room in a theater where performers rest or have visitors | - |
| clingfilm | 17 | a thin plastic film made of saran (trade name Saran Wrap) that sticks to itself; used for wrapping food | - |
| windstorm | 15 | a storm consisting of violent winds | - |
| shamanism | 16 | an animistic religion of northern Asia having the belief that the mediation between the visible and the spirit worlds is effected by shamans | - |
| pluralism | 13 | a social organization in which diversity of racial or religious or ethnic or cultural groups is tolerated | - |
| reconfirm | 16 | confirm again | You must reconfirm your flight reservations |
| petersham | 16 | - | - |
| dogmatism | 15 | the intolerance and prejudice of a bigot | - |
| feudalism | 15 | the social system that developed in Europe in the 8th century; vassals were protected by lords who they had to serve in war | - |
| brainstem | 13 | the part of the brain continuous with the spinal cord and comprising the medulla oblongata and pons and midbrain and parts of the hypothalamus | - |
| antiserum | 11 | blood serum containing antibodies against specific antigens; provides immunity to a disease | - |
| anarchism | 16 | a political theory favoring the abolition of governments | - |
| midstream | 14 | the middle of a stream | - |
| strontium | 11 | a soft silver-white or yellowish metallic element of the alkali metal group; turns yellow in air; occurs in celestite and strontianite | - |
| roundworm | 15 | infections of the skin or nails caused by fungi and appearing as itching circular patches | - |
| racialism | 13 | discriminatory or abusive behavior towards members of another race | - |
| macrocosm | 17 | everything that exists anywhere | - |
| cytoplasm | 18 | the protoplasm of a cell excluding the nucleus; is full of proteins that control cell metabolism | - |
| euphonium | 16 | a bass horn (brass wind instrument) that is the tenor of the tuba family | - |
| exoticism | 20 | the quality of being exotic | he loved the exoticism of Egypt |
| cheongsam | 17 | - | - |
| neologism | 12 | a newly invented word or phrase | - |
| occultism | 15 | a belief in supernatural powers and the possibility of bringing them under human control | - |
| witticism | 16 | a message whose ingenuity or verbal skill or incongruity has the power to evoke laughter | - |
| sensorium | 11 | the areas of the brain that process and register incoming sensory information and make possible the conscious awareness of the world | - |
| vermiform | 19 | resembling a worm; long and thin and cylindrical | - |
| deuterium | 12 | an isotope of hydrogen which has one neutron (as opposed to zero neutrons in hydrogen) | - |
| ostracism | 13 | the state of being banished or ostracized (excluded from society by general consent) | - |
| tribalism | 13 | the beliefs of a tribal society | - |
| practicum | 17 | - | - |
| quitclaim | 22 | document transferring title or right or claim to another | - |
| cruciform | 18 | shaped like a cross | - |
| cymbidium | 21 | any of various plants of the genus Cymbidium having narrow leaves and a long drooping cluster of numerous showy and variously colored boat-shaped flowers; extensively hybridized and cultivated as houseplants and important florists' flowers | - |
| diabolism | 14 | a belief in and reverence for devils (especially Satan) | - |
| collyrium | 16 | lotion consisting of a solution used as a cleanser for the eyes | - |
| germanium | 14 | a brittle grey crystalline element that is a semiconducting metalloid (resembling silicon) used in transistors; occurs in germanite and argyrodite | - |
| epicurism | 15 | the disposition and habits of an epicure | - |
| centigram | 14 | - | - |
| athenaeum | 14 | a literary or scientific association for the promotion of learning | - |
| arboretum | 13 | a facility where trees and shrubs are cultivated for exhibition | - |
| misoneism | 13 | hatred of change or innovation | - |
| mitriform | 16 | - | - |
| misbeseem | 15 | - | - |
| misinform | 16 | give false or misleading information to | - |
| misesteem | 13 | - | - |
| mosaicism | 15 | the condition in which an organism has two or more cell populations that differ in genetic makeup | - |
| molluscum | 15 | any skin disease characterized by soft pulpy nodules | - |
| monachism | 18 | - | - |
| monoecism | 15 | - | - |
| mongolism | 14 | a congenital disorder caused by having an extra 21st chromosome; results in a flat face and short stature and mental retardation | - |
| monergism | 14 | - | - |
| monkeyism | 20 | - | - |
| multiroom | 13 | - | - |
| mummiform | 20 | - | - |
| myelogram | 17 | X-ray film of the spinal cord and spinal nerve roots and subarachnoid space | - |
| mutualism | 13 | the relation between two different species of organisms that are interdependent; each gains benefits from the other | - |
| multiatom | 13 | - | - |
| mullahism | 16 | - | - |
| multiform | 16 | occurring in or having many forms or shapes or appearances | the multiform universe of nature and man |
| multigerm | 14 | - | - |
| mridamgam | 17 | - | - |
| mridangam | 15 | - | - |
| neodymium | 17 | a yellow trivalent metallic element of the rare earth group; occurs in monazite and bastnasite in association with cerium and lanthanum and praseodymium | - |
| nelumbium | 15 | - | - |
| neurogram | 12 | - | - |
| nephalism | 16 | - | - |
| nephogram | 17 | - | - |
| neoterism | 11 | - | - |
| neptunium | 13 | a radioactive transuranic metallic element; found in trace amounts in uranium ores; a by-product of the production of plutonium | - |
| narcotism | 13 | - | - |
| mythicism | 21 | - | - |
| niggerdom | 14 | - | - |
| niggerism | 13 | - | - |
| nymphaeum | 21 | - | - |
| noodledom | 13 | - | - |
| nonrandom | 12 | not random | - |
| nonsystem | 14 | - | - |
| opusculum | 15 | - | - |
| operculum | 15 | a hard flap serving as a cover for (a) the gill slits in fishes or (b) the opening of the shell in certain gastropods when the body is retracted | - |
| opobalsam | 15 | - | - |
| orphanism | 16 | - | - |
| osteoderm | 12 | - | - |
| overgloom | 15 | - | - |
| overclaim | 16 | - | - |
| outscream | 13 | - | - |
| panlogism | 14 | - | - |
| pantheism | 16 | (rare) worship that admits or tolerates all gods | - |
| paramylum | 18 | - | - |
| padronism | 14 | - | - |
| panderism | 14 | - | - |
| panegoism | 14 | - | - |
| pauperism | 15 | a state of extreme poverty or destitution | - |
| pedantism | 14 | - | - |
| passivism | 16 | the doctrine that all violence is unjustifiable | - |
| pastorium | 13 | - | - |
| memoirism | 15 | - | - |
| menstruum | 13 | the monthly discharge of blood from the uterus of nonpregnant women from puberty to menopause | - |
| meliorism | 13 | the belief that the world can be made better by human effort | - |
| mescalism | 15 | - | - |
| mesmerism | 15 | the act of inducing hypnosis | - |
| mephitism | 18 | - | - |
| mentalism | 13 | (philosophy) a doctrine that mind is the true reality and that objects exist only as aspects of the mind's awareness | - |
| mazaedium | 23 | - | - |
| midrashim | 17 | - | - |
| metaplasm | 15 | - | - |
| metaxylem | 23 | - | - |
| meteorism | 13 | - | - |
| methodism | 17 | the religious beliefs and practices of Methodists characterized by concern with social welfare and public morals | - |
| microgram | 16 | one millionth (1/1,000,000) gram | - |
| microform | 18 | - | - |
| metricism | 15 | - | - |
| microbeam | 17 | - | - |
| whitebeam | 19 | - | - |
| ytterbium | 16 | a soft silvery metallic element; a rare earth of the lanthanide series; it occurs in gadolinite and monazite and xenotime | - |
| yuppiedom | 19 | - | - |
| zealotism | 20 | - | - |
| zootheism | 23 | - | - |
| zygosperm | 26 | - | - |
| zygantrum | 24 | - | - |
| zoocytium | 25 | - | - |
| voltinism | 14 | - | - |
| vorticism | 16 | - | - |
| voodooism | 15 | a religious cult practiced chiefly in Caribbean countries (especially Haiti); involves witchcraft and animistic deities | - |
| wagenboom | 17 | - | - |
| vulcanism | 16 | - | - |
| vulsellum | 14 | - | - |
| vulturism | 14 | - | - |
| vulviform | 20 | - | - |
| vulpinism | 16 | - | - |
| vulgarism | 15 | the quality of lacking taste and refinement | - |
| virginium | 15 | - | - |
| villiform | 17 | - | - |
| videogram | 16 | - | - |
| vikingism | 19 | - | - |
| viticetum | 16 | - | - |
| vitriform | 17 | - | - |
| wheatworm | 20 | small roundworm parasitic on wheat | - |
| welfarism | 17 | - | - |
| saturnism | 11 | toxic condition produced by the absorption of excessive lead into the system | - |
| sargassum | 12 | brown algae with rounded bladders forming dense floating masses in tropical Atlantic waters as in the Sargasso Sea | - |
| sarmentum | 13 | - | - |
| scalogram | 14 | - | - |
| savagedom | 16 | - | - |
| salpiform | 16 | - | - |
| salesroom | 11 | an area where merchandise (such as cars) can be displayed | in Britain a showroom is called a salesroom |
| salicetum | 13 | - | - |
| screwworm | 19 | - | - |
| scientism | 13 | - | - |
| scutellum | 13 | - | - |
| scutiform | 16 | - | - |
| shammasim | 18 | - | - |
| shammosim | 18 | - | - |
| sexualism | 18 | - | - |
| shelfroom | 17 | - | - |
| sheikhdom | 22 | the domain ruled by a sheik | - |
| serialism | 11 | 20th century music that uses a definite order of notes as a thematic basis for a musical composition | - |
| sensillum | 11 | - | - |
| septiform | 16 | - | - |
| separatum | 13 | - | - |
| septarium | 13 | - | - |
| servilism | 14 | - | - |
| serriform | 14 | - | - |
| sialogram | 12 | - | - |
| siddhuism | 16 | - | - |
| shochetim | 19 | - | - |
| sigmatism | 14 | - | - |
| singledom | 13 | - | - |
| sovietism | 14 | Soviet communism | - |
| sociogram | 14 | - | - |
| spiniform | 16 | - | - |
| spiralism | 13 | - | - |
| spiritism | 13 | concern with things of the spirit | - |
| spirillum | 13 | any flagellated aerobic bacteria having a spirally twisted rodlike form | - |
| spirogram | 14 | a recording of breathing made with a spirograph | - |
| spodogram | 15 | - | - |
| stackroom | 17 | - | - |
| staffroom | 17 | - | - |
| squiredom | 21 | - | - |
| sporidesm | 14 | - | - |
| sporidium | 14 | - | - |
| stipiform | 16 | - | - |
| stillroom | 11 | a pantry or storeroom connected with the kitchen (especially in a large house) for preparing tea and beverages and for storing liquors and preserves and tea etc | - |
| stomodeum | 14 | - | - |
| steadicam | 14 | - | - |
| styliform | 17 | - | - |
| stylitism | 14 | - | - |
| strawworm | 17 | larva of the caddis fly; constructs a case of silk covered with sand or plant debris | - |
| strongarm | 12 | - | - |
| ritualism | 11 | exaggerated emphasis on the importance of rites or ritualistic forms in worship | - |
| rhotacism | 16 | - | - |
| rhipidium | 17 | - | - |
| rhizobium | 25 | the type genus of Rhizobiaceae; usually occur in the root nodules of legumes; can fix atmospheric oxygen | - |
| rhopalism | 16 | - | - |
| ruthenium | 14 | a rare polyvalent metallic element of the platinum group; it is found associated with platinum | - |
| rusticism | 13 | a rural idiom or expression | - |
| sagapenum | 14 | - | - |
| sabbatism | 15 | - | - |
| saccharum | 18 | tall perennial reedlike grass originally of southeastern Asia: sugarcane | - |
| sacciform | 18 | - | - |
| sachemdom | 19 | - | - |
| sacrarium | 13 | - | - |
| rostellum | 11 | - | - |
| routinism | 11 | - | - |
| tachogram | 17 | a graphical record of speed and distance produced by a tachograph | - |
| tallithim | 14 | - | - |
| talmudism | 14 | - | - |
| tallaisim | 11 | - | - |
| sympodium | 19 | - | - |
| synangium | 15 | - | - |
| syllabism | 16 | - | - |
| syllogism | 15 | deductive reasoning in which a conclusion is derived from two premises | - |
| synedrium | 15 | - | - |
| syncytium | 19 | a mass of cytoplasm containing several nuclei and enclosed in a membrane but no internal cell boundaries (as in muscle fibers) | - |
| synergism | 15 | the working together of two things (muscles or drugs for example) to produce an effect greater than the sum of their individual effects | - |
| synoecism | 16 | - | - |
| temazepam | 24 | a frequently prescribed benzodiazepine (trade name Restoril); takes effect slowly and lasts long enough to help those people who wake up frequently during the night | - |
| tellurium | 11 | a brittle silver-white metalloid element that is related to selenium and sulfur; it is used in alloys and as a semiconductor; occurs mainly as tellurides in ores of copper and nickel and silver and gold | - |
| tegmentum | 14 | - | - |
| tentorium | 11 | (anatomy) a fold of dura mater that covers the cerebellum and supports the occipital lobes of the cerebrum | - |
| tephigram | 17 | - | - |
| tenaculum | 13 | - | - |
| tenebrism | 13 | - | - |
| tantalism | 11 | - | - |
| tarantism | 11 | a nervous disorder characterized by an uncontrollable impulse to dance; popularly attributed to bite of the southern European tarantula or wolf spider | - |
| taraxacum | 20 | an asterid dicot genus of the family Compositae including dandelions | - |
| tectiform | 16 | - | - |
| tectonism | 13 | - | - |
| tauriform | 14 | - | - |
| thralldom | 15 | the state of being under the control of another person | - |
| terminism | 13 | - | - |
| terraform | 14 | - | - |
| tetragram | 12 | a word that is written with four letters in an alphabetic writing system | - |
| thanatism | 14 | - | - |
| tormentum | 13 | - | - |
| trapezium | 22 | the wrist bone on the thumb side of the hand that articulates with the 1st and 2nd metacarpals | - |
| trendyism | 15 | - | - |
| tribadism | 14 | a form of lesbianism that simulates heterosexual intercourse | - |
| tsaddikim | 17 | - | - |
| tsaddiqim | 22 | - | - |
| triennium | 11 | - | - |
| trifolium | 14 | any leguminous plant having leaves divided into three leaflets | - |
| triforium | 14 | - | - |
| tripudium | 14 | - | - |
| trisodium | 12 | - | - |
| triticism | 13 | - | - |
| tritheism | 14 | (Christianity) the heretical belief that the Father and the Son and the Holy Spirit are three separate gods | - |
| trimerism | 13 | - | - |
| tzaddikim | 26 | - | - |
| tzaddiqim | 31 | - | - |
| tutiorism | 11 | - | - |
| underbrim | 14 | - | - |
| unchrisom | 16 | - | - |
| unconform | 16 | - | - |
| unfreedom | 15 | - | - |
| unguentum | 12 | - | - |
| unguiform | 15 | - | - |
| unununium | 11 | - | - |
| unrealism | 11 | a representation having no reference to concrete objects or specific examples | - |
| uropygium | 17 | posterior part of a bird's body from which the tail feathers grow | - |
| uredinium | 12 | - | - |
| vaccinium | 18 | evergreen or deciduous berry-bearing shrubs of northern hemisphere: cranberries; blueberries | - |
| verbalism | 16 | the communication (in speech or writing) of your beliefs or opinions | the idea was immediate but the verbalism took hours |
| verbascum | 18 | genus of coarse herbs and subshrubs mostly with woolly leaves | - |
| versiform | 17 | - | - |
| vestigium | 15 | - | - |
| vasospasm | 16 | - | - |
| sulfonium | 14 | - | - |
| superatom | 13 | - | - |
| subphylum | 21 | (biology) a taxonomic group ranking between a phylum and a class | - |
| submentum | 15 | - | - |
| swarajism | 21 | - | - |
| sutteeism | 11 | - | - |
| superfarm | 16 | - | - |
| superfirm | 16 | - | - |
| placoderm | 16 | fish-like vertebrate with bony plates on head and upper body; dominant in seas and rivers during the Devonian; considered the earliest vertebrate with jaws | - |
| piroplasm | 15 | minute parasite of red blood cells of mammals transmitted by a tick and causing diseases of domestic animals | - |
| pisciform | 18 | - | - |
| platonism | 13 | (philosophy) the philosophical doctrine that abstract concepts exist independent of their names | - |
| pictogram | 16 | - | - |
| piracetam | 15 | - | - |
| poeticism | 15 | - | - |
| polygonum | 17 | diverse genus of herbs or woody subshrubs of north temperate regions | - |
| polypidom | 19 | - | - |
| pollinium | 13 | a coherent mass of pollen grains (as in orchids) | - |
| plexiform | 23 | - | - |
| plutonism | 13 | - | - |
| pomoerium | 15 | - | - |
| prelatism | 13 | - | - |
| pressroom | 13 | - | - |
| prereform | 16 | - | - |
| prescutum | 15 | - | - |
| preinform | 16 | - | - |
| predatism | 14 | - | - |
| propodeum | 16 | - | - |
| proreform | 16 | - | - |
| proofroom | 16 | - | - |
| prooemium | 15 | - | - |
| prettyism | 16 | - | - |
| princedom | 16 | territory ruled by a prince | - |
| privatism | 16 | - | - |
| puerilism | 13 | - | - |
| purdonium | 14 | - | - |
| protoderm | 14 | - | - |
| pterygium | 17 | either of two thickened triangular layers of conjunctiva extending from the nasal edge of the eye to the cornea; it arises from irritation of the pinguecula | - |
| prytaneum | 16 | - | - |
| quercetum | 22 | - | - |
| quickbeam | 28 | - | - |
| quixotism | 27 | quixotic (romantic and impractical) behavior | - |
| rabbinism | 15 | - | - |
| pyroceram | 18 | - | - |
| pyrethrum | 19 | spring-flowering garden perennial of Asiatic origin having finely divided aromatic leaves and white to pink-purple flowers; source of an insecticide; sometimes placed in genus Chrysanthemum | - |
| puzzledom | 32 | - | - |
| pycnidium | 19 | flask-shaped asexual structure containing conidia | - |
| pyelogram | 17 | an X ray of the kidneys and ureters | - |
| quaesitum | 20 | - | - |
| reacclaim | 15 | - | - |
| rascaldom | 14 | - | - |
| rascalism | 13 | - | - |
| rebaptism | 15 | - | - |
| ranterism | 11 | - | - |
| ralliform | 14 | - | - |
| reddendum | 14 | - | - |
| reblossom | 13 | - | - |
| reformism | 16 | a doctrine of reform | - |
| reptilium | 13 | - | - |
| reticulum | 13 | the second compartment of the stomach of a ruminant | - |
| responsum | 13 | - | - |
| restiform | 14 | - | - |
| perinaeum | 13 | - | - |
| perciform | 18 | - | - |
| periplasm | 15 | - | - |
| perisperm | 15 | the nutritive tissue outside the sac containing the embryo in some seeds | - |
| pelviform | 19 | - | - |
| pelmanism | 15 | - | - |
| pennalism | 13 | - | - |
| penniform | 16 | - | - |
| photogram | 17 | - | - |
| phonetism | 16 | - | - |
| phonogram | 17 | any written symbol standing for a sound or syllable or morpheme or word | - |
| physicism | 21 | - | - |
| petrogram | 14 | - | - |
| phenakism | 20 | - | - |
| phaenogam | 17 | - | - |
| phantasim | 16 | - | - |
| hoydenism | 18 | masculinity in women (especially in girls and young women) | - |
| hydronium | 18 | - | - |
| hybridism | 20 | - | - |
| hordeolum | 15 | an infection of the sebaceous gland of the eyelid | - |
| hoodooism | 15 | a religious cult practiced chiefly in Caribbean countries (especially Haiti); involves witchcraft and animistic deities | - |
| houseroom | 14 | space for accommodation in a house | I wouldn't give that table houseroom |
| hospitium | 16 | - | - |
| hyphenism | 22 | - | - |
| hypogaeum | 20 | - | - |
| hylozoism | 26 | - | - |
| hypericum | 21 | large almost cosmopolitan genus of evergreen or deciduous shrubs and herbs with often showy yellow flowers; cosmopolitan except tropical lowlands and Arctic or high altitudes and desert regions | - |
| idioplasm | 14 | - | - |
| indecorum | 14 | an act of undue intimacy | - |
| impluvium | 18 | - | - |
| interfirm | 14 | - | - |
| isobarism | 13 | - | - |
| irenicism | 13 | - | - |
| isomerism | 13 | the state of being an isomer; the complex of chemical and physical phenomena characteristic of isomers | - |
| interterm | 11 | - | - |
| jointworm | 21 | larva of chalcid flies injurious to the straw of wheat and other grains | - |
| jockeyism | 27 | - | - |
| junglegym | 23 | - | - |
| kabbalism | 19 | adherence to some extreme traditional theological concept or interpretation | - |
| jesuitism | 18 | the theology or the practices of the Jesuits (often considered to be casuistic) | - |
| jetstream | 18 | - | - |
| kissagram | 16 | - | - |
| kissogram | 16 | - | - |
| klephtism | 20 | - | - |
| klezmorim | 26 | - | - |
| karyogram | 19 | - | - |
| kaiserdom | 16 | - | - |
| kaiserism | 15 | - | - |
| kaddishim | 20 | - | - |
| kibbutzim | 28 | - | - |
| lanthanum | 14 | a white soft metallic element that tarnishes readily; occurs in rare earth minerals and is usually classified as a rare earth | - |
| lanciform | 16 | - | - |
| larviform | 17 | - | - |
| lathyrism | 17 | - | - |
| labourism | 13 | - | - |
| labialism | 13 | - | - |
| labdacism | 16 | - | - |
| libriform | 16 | - | - |
| ligniform | 15 | - | - |
| lichenism | 16 | - | - |
| lentiform | 14 | convex on both sides; shaped like a lentil | - |
| liturgism | 12 | - | - |
| literatim | 11 | - | - |
| magianism | 14 | - | - |
| maenadism | 14 | - | - |
| magmatism | 16 | - | - |
| magnalium | 14 | - | - |
| machzorim | 27 | - | - |
| martyrium | 16 | - | - |
| marsupium | 15 | an external abdominal pouch in most marsupials where newborn offspring are suckled | - |
| mashgihim | 20 | - | - |
| masterdom | 14 | - | - |
| mammiform | 20 | - | - |
| mammonism | 17 | - | - |
| manubrium | 15 | the upper part of the breastbone | - |
| heliogram | 15 | a message transmitted by means of the sun's rays | - |
| helvetium | 17 | - | - |
| hectogram | 17 | 100 grams | - |
| hectorism | 16 | - | - |
| hektogram | 19 | - | - |
| heightism | 18 | - | - |
| herbarium | 16 | a collection of dried plants that are mounted and systematically classified for study | - |
