10-letter words ending with M
Dive into the specific realm of 10-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 |
|---|---|---|---|
| enthusiasm | 15 | overflowing with eager enjoyment or approval | - |
| millennium | 14 | the 1000th anniversary (or the celebration of it) | - |
| capitalism | 16 | an economic system based on private ownership of capital | - |
| journalism | 19 | newspapers and magazines collectively | - |
| mainstream | 14 | the prevailing current of thought | his thinking was in the American mainstream |
| bridegroom | 16 | a man who has recently been married | - |
| auditorium | 13 | the area of a theater or concert hall where the audience sits | - |
| patriotism | 14 | love of country and willingness to sacrifice for it | they rode the same wave of popular patriotism |
| curriculum | 16 | an integrated course of academic studies | - |
| sanatorium | 12 | pejorative terms for an insane asylum | - |
| downstream | 16 | away from the source or with the current | - |
| metabolism | 16 | the marked and rapid transformation of a larva into an adult that occurs in some animals | - |
| postmortem | 16 | an examination and dissection of a dead body to determine cause of death or the changes produced by disease | - |
| alcoholism | 17 | habitual intoxication; prolonged and excessive intake of alcoholic drinks leading to a breakdown in health and an addiction to alcohol such that abrupt deprivation leads to severe withdrawal symptoms | - |
| sanitarium | 12 | a hospital for recuperation or for the treatment of chronic diseases | - |
| chloroform | 20 | a volatile liquid haloform (CHCl3); formerly used as an anesthetic | chloroform was the first inhalation anesthetic |
| rheumatism | 17 | a chronic autoimmune disease with inflammation of the joints and marked deformities; something (possibly a virus) triggers an attack on the synovium by the immune system, which releases cytokines that stimulate an inflammatory reaction that can lead to the destruction of all components of the joint | - |
| memorandum | 17 | a written proposal or reminder | - |
| narcissism | 14 | an exceptional interest in and admiration for yourself | - |
| consortium | 14 | an association of companies for some definite purpose | - |
| plagiarism | 15 | the act of plagiarizing; taking someone's words or ideas as if they were your own | - |
| brainstorm | 14 | the clear (and often sudden) understanding of a complex situation | - |
| skepticism | 20 | doubt about the truth of something | - |
| surrealism | 12 | a 20th century movement of artists and writers (developing out of dadaism) who used fantastic images and incongruous juxtapositions in order to represent unconscious thoughts and dreams | - |
| referendum | 16 | a legislative act is referred for final approval to a popular vote by the electorate | - |
| liberalism | 14 | an economic theory advocating free competition and a self-regulating market | - |
| militarism | 14 | a political orientation of a people or a government to maintain a strong military force and to be prepared to use it aggressively to defend or promote national interests | - |
| moratorium | 14 | a legally authorized postponement before some obligation must be discharged | - |
| cerebellum | 16 | a major division of the vertebrate brain; situated above the medulla oblongata and beneath the cerebrum in humans | - |
| monotheism | 17 | belief in a single God | - |
| fanaticism | 17 | excessive intolerance of opposing views | - |
| chauvinism | 20 | activity indicative of belief in the superiority of men over women | - |
| cryptogram | 20 | a piece of writing in code or cipher | - |
| lesbianism | 14 | female homosexuality | - |
| favoritism | 18 | an inclination to favor some person or group | - |
| antagonism | 13 | a state of deep-seated ill-will | - |
| pragmatism | 17 | the attribute of accepting the facts of life and favoring practicality and literal truth | - |
| postpartum | 16 | occurring immediately after birth | - |
| recidivism | 18 | habitual relapse into crime | - |
| molybdenum | 20 | a polyvalent metallic element that resembles chromium and tungsten in its properties; used to strengthen and harden steel | - |
| compendium | 19 | a publication containing a variety of works | - |
| scepticism | 18 | the disbelief in any claims of ultimate knowledge | - |
| bolshevism | 20 | Soviet communism | - |
| cardiogram | 16 | a graphical recording of the cardiac cycle produced by an electrocardiograph | - |
| honorarium | 15 | a fee paid for a nominally free service | - |
| traumatism | 14 | - | - |
| proscenium | 16 | the wall that separates the stage from the auditorium in a modern theater | - |
| protoplasm | 16 | the substance of a living cell (including cytoplasm and nucleus) | - |
| radicalism | 15 | the political orientation of those who favor revolutionary change in government and society | - |
| relativism | 15 | (philosophy) the philosophical doctrine that all criteria of judgment are relative to the individuals and situations involved | - |
| slipstream | 14 | the flow of air that is driven backwards by an aircraft propeller | - |
| naturalism | 12 | an artistic movement in 19th century France; artists and writers strove for detailed realistic and factual description | - |
| schoolmarm | 19 | a woman schoolteacher (especially one regarded as strict) | - |
| schoolroom | 17 | a room in a school where lessons take place | - |
| simulacrum | 16 | a representation of a person (especially in the form of sculpture) | - |
| strongroom | 13 | a burglarproof and fireproof room in which valuables are kept | - |
| federalism | 16 | the idea of a federal organization of more or less self-governing units | - |
| alprazolam | 23 | an antianxiety agent (trade name Xanax) of the benzodiazepine class | - |
| conformism | 19 | orthodoxy in thoughts and belief | - |
| automatism | 14 | any reaction that occurs automatically without conscious thought or reflection (especially the undirected behavior seen in psychomotor epilepsy) | - |
| asceticism | 16 | rigorous self-denial and active self-restraint | - |
| polytheism | 20 | belief in multiple Gods | - |
| paramecium | 18 | any member of the genus Paramecium | - |
| secularism | 14 | a doctrine that rejects religion and religious considerations | - |
| evangelism | 16 | zealous preaching and advocacy of the gospel | - |
| colloquium | 23 | an academic meeting or seminar usually led by a different lecturer and on a different topic at each meeting | - |
| brahmanism | 19 | the religious beliefs of ancient India as prescribed in the sacred Vedas and Brahmanas and Upanishads | - |
| antebellum | 14 | belonging to a period before a war especially the American Civil War | - |
| separatism | 14 | advocacy of a policy of strict separation of church and state | - |
| absolutism | 14 | the principle of complete and unrestricted power in government | - |
| gnosticism | 15 | a religious orientation advocating gnosis as the way to release a person's spiritual element; considered heresy by Christian churches | - |
| pharisaism | 17 | - | - |
| puritanism | 14 | strictness and austerity in conduct and religion | - |
| parasitism | 14 | the relation between two different kinds of organisms in which one receives benefits from the other by causing damage to it (usually not fatal damage) | - |
| stumblebum | 18 | an awkward stupid person | - |
| nasturtium | 12 | aquatic herbs | - |
| outperform | 17 | be or do something to a greater degree | This car outperforms all others in its class |
| ecotourism | 14 | tourism to exotic or threatened ecosystems to observe wildlife or to help preserve nature | - |
| empiricism | 18 | medical practice and advice based on observation and experience in ignorance of scientific findings | - |
| meadowfoam | 21 | - | - |
| hammerbeam | 21 | - | - |
| carbapenem | 18 | - | - |
| berdachism | 20 | - | - |
| bijuralism | 21 | - | - |
| diammonium | 17 | - | - |
| subminimum | 18 | - | - |
| tabloidism | 15 | - | - |
| popularism | 16 | music adapted to the understanding and taste of the majority | - |
| springform | 18 | - | - |
| conclavism | 19 | - | - |
| churnalism | 17 | - | - |
| blogstream | 15 | - | - |
| blamestorm | 16 | - | - |
| generalism | 13 | - | - |
| freeganism | 16 | - | - |
| hacktivism | 24 | - | - |
| minisystem | 17 | - | - |
| livestream | 15 | - | - |
| lamestream | 14 | - | - |
| slactivism | 17 | - | - |
| superstorm | 14 | - | - |
| stripogram | 15 | - | - |
| workstream | 19 | - | - |
| cankerworm | 21 | green caterpillar of a geometrid moth; pest of various fruit and shade trees | - |
| cancriform | 19 | - | - |
| capitellum | 16 | - | - |
| cafetorium | 17 | - | - |
| caffeinism | 20 | poisoning resulting from excessive intake of caffeine containing products | - |
| caddisworm | 19 | larva of the caddis fly; constructs a case of silk covered with sand or plant debris | - |
| calyciform | 22 | - | - |
| calceiform | 19 | of slipper-shaped blossoms | the calceiform lip of certain orchids |
| catabolism | 16 | breakdown in living organisms of more complex substances into simpler ones together with release of energy | - |
| charmonium | 19 | - | - |
| centralism | 14 | the political policy of concentrating power in a central organization | - |
| choreiform | 20 | - | - |
| chloralism | 17 | - | - |
| cicisbeism | 18 | - | - |
| cinerarium | 14 | a niche for a funeral urn containing the ashes of the cremated dead | - |
| cinchonism | 19 | - | - |
| chronogram | 18 | - | - |
| chromidium | 20 | - | - |
| chromogram | 20 | - | - |
| chimaerism | 19 | - | - |
| clypeiform | 22 | - | - |
| clonazepam | 25 | - | - |
| cockalorum | 20 | - | - |
| classicism | 16 | a movement in literature and art during the 17th and 18th centuries in Europe that favored rationality and restraint and strict forms | classicism often derived its models from the ancient Greeks and Romans |
| coenosteum | 14 | - | - |
| cockneydom | 24 | - | - |
| cockneyism | 23 | - | - |
| concretism | 16 | a representation of an abstract idea in concrete terms | - |
| compluvium | 21 | - | - |
| concettism | 16 | - | - |
| conchiform | 22 | - | - |
| conacreism | 16 | - | - |
| copperworm | 21 | - | - |
| convictism | 19 | - | - |
| corniculum | 16 | - | - |
| consortism | 14 | - | - |
| cribriform | 19 | - | - |
| coryneform | 20 | - | - |
| cottierism | 14 | - | - |
| cotyliform | 20 | - | - |
| cumuliform | 19 | shaped like a cumulus cloud | - |
| cyathiform | 23 | - | - |
| crossclaim | 16 | - | - |
| cristiform | 17 | - | - |
| crippledom | 19 | - | - |
| cuculiform | 19 | - | - |
| cucumiform | 21 | - | - |
| cultriform | 17 | - | - |
| culiciform | 19 | - | - |
| decimalism | 17 | - | - |
| dendrobium | 16 | a plant of the genus Dendrobium having stems like cane and usually showy racemose flowers | - |
| dendrogram | 15 | - | - |
| dendriform | 17 | resembling a tree in form and branching structure | dendriform sponges |
| demagogism | 17 | - | - |
| demirepdom | 18 | - | - |
| delphinium | 18 | any plant of the genus Delphinium having palmately divided leaves and showy spikes of variously colored spurred flowers; some contain extremely poisonous substances | - |
| bowdlerism | 18 | censorship in the form of prudish expurgation | - |
| bourbonism | 16 | - | - |
| boosterism | 14 | - | - |
| brahminism | 19 | the religious beliefs of ancient India as prescribed in the sacred Vedas and Brahmanas and Upanishads | - |
| bradyseism | 18 | - | - |
| autotheism | 15 | - | - |
| baalebatim | 16 | - | - |
| atracurium | 14 | - | - |
| asystolism | 15 | - | - |
| bantingism | 15 | - | - |
| bastardism | 15 | - | - |
| baculiform | 19 | formed like a bacillus | - |
| apophthegm | 23 | a short pithy instructive saying | - |
| apothecium | 19 | a cuplike ascocarp in many lichens and ascomycetous fungi | - |
| aplanatism | 14 | - | - |
| anticivism | 17 | - | - |
| antemortem | 14 | preceding death | antemortem confession |
| antiracism | 14 | - | - |
| antireform | 15 | - | - |
| antitheism | 15 | - | - |
| antimerism | 14 | - | - |
| asepticism | 16 | - | - |
| ascogonium | 15 | - | - |
| astaticism | 14 | - | - |
| archaicism | 19 | the use of an archaic expression | - |
| archoplasm | 19 | - | - |
| archiplasm | 19 | - | - |
| argumentum | 15 | - | - |
| belletrism | 14 | - | - |
| bestialism | 14 | - | - |
| bipedalism | 17 | the bodily attribute of being bipedal; having two feet | bipedalism made the human form of birth possible |
| blastoderm | 15 | a layer of cells on the inside of the blastula | - |
| blepharism | 19 | condition in which a person blinks continuously | - |
| allomerism | 14 | (chemistry) variability in chemical composition without variation in crystalline form | - |
| alternatim | 12 | - | - |
| amateurism | 14 | the conviction that people should participate in sports as a hobby (for the fun of it) rather than for money | - |
| allotheism | 15 | - | - |
| afterswarm | 18 | - | - |
| androecium | 15 | a male gametoecium | - |
| angiosperm | 15 | plants having seeds in a closed ovary | - |
| amoebiform | 19 | - | - |
| ammoniacum | 18 | - | - |
| ambulacrum | 18 | one of the five areas on the undersurface of an echinoderm on which the tube feet are located | - |
| anaerobium | 14 | - | - |
| anacardium | 15 | type genus of the Anacardiaceae: cashew | - |
| anachorism | 17 | - | - |
| anabaptism | 16 | a Protestant movement in the 16th century that believed in the primacy of the Bible, baptised only believers, not infants, and believed in complete separation of church and state | - |
| absinthism | 17 | - | - |
| acrobatism | 16 | - | - |
| acroterium | 14 | - | - |
| actiniform | 17 | - | - |
| acetabulum | 16 | the cup-shaped hollow in the hipbone into which the head of the femur fits to form a ball-and-socket joint | - |
| hackneyism | 24 | - | - |
| gymnosperm | 20 | plants of the class Gymnospermae having seeds not enclosed in an ovary | - |
| gynandrism | 17 | - | - |
| hegemonism | 18 | - | - |
| heathenism | 18 | any of various religions other than Christianity or Judaism or Islamism | - |
| heathendom | 19 | - | - |
| henotheism | 18 | - | - |
| hemelytrum | 20 | - | - |
| headstream | 16 | a stream that forms the source of a river | - |
| haustellum | 15 | - | - |
| haustorium | 15 | a root-like attachment in parasitic plants that penetrates and obtains food from the host | - |
| hipsterism | 17 | - | - |
| homeotherm | 20 | an animal that has a body temperature that is relatively constant and independent of the environmental temperature | - |
| hidalgoism | 17 | - | - |
| hexamerism | 24 | - | - |
| heteroatom | 15 | - | - |
| humoralism | 17 | - | - |
| hyaloplasm | 20 | the clear nongranular portion of the cytoplasm of a cell | - |
| hoodlumism | 18 | - | - |
| horologium | 16 | - | - |
| iconoclasm | 16 | the orientation of an iconoclast | - |
| immobilism | 18 | - | - |
| illuminism | 14 | - | - |
| hylotheism | 21 | - | - |
| hypanthium | 23 | the cuplike or ringlike or tubular structure of a flower which bears the sepals and stamens and calyx (as in Rosaceae) | - |
| hypocorism | 22 | a name of endearment (especially one using a diminutive suffix) | `Billy' is a hypocorism for `William' |
| incisiform | 17 | - | - |
| immoralism | 16 | - | - |
| impaludism | 17 | - | - |
| initialism | 12 | a word formed from the initial letters of the several words in the name and pronounced as one word | `NATO' is an initialism for North Atlantic Treaty Organization |
| indumentum | 15 | a covering of fine hairs (or sometimes scales) as on a leaf or insect | - |
| individuum | 17 | - | - |
| invalidism | 16 | chronic ill health | - |
| intravitam | 15 | - | - |
| insularism | 12 | the state of being isolated or detached | - |
| isotropism | 14 | - | - |
| iridosmium | 15 | - | - |
| involucrum | 17 | - | - |
| kitchendom | 22 | - | - |
| kettledrum | 17 | a large hemispherical brass or copper percussion instrument with a drumhead that can be tuned by adjusting the tension on it | - |
| karyoplasm | 21 | the protoplasm that constitutes the nucleus of a cell | - |
| katabolism | 18 | breakdown in living organisms of more complex substances into simpler ones together with release of energy | - |
| kaffirboom | 24 | - | - |
| legitimism | 15 | - | - |
| lawrencium | 17 | a radioactive transuranic element synthesized from californium | - |
| lebensraum | 14 | space sought for occupation by a nation whose population is expanding | - |
| lageniform | 16 | - | - |
| lambdacism | 19 | speech defect involving excessive use or unusual pronunciation of the phoneme `l' | - |
| laconicism | 16 | terseness of expression | - |
| literalism | 12 | a disposition to interpret statements in their literal sense | - |
| linguiform | 16 | - | - |
| lenocinium | 14 | - | - |
| letterform | 15 | - | - |
| limaciform | 19 | - | - |
| glandiform | 17 | - | - |
| glochidium | 19 | a barbed spine or bristle (often tufted on cacti) | - |
| genteelism | 13 | - | - |
| geotropism | 15 | an orienting response to gravity | - |
| gestaltism | 13 | - | - |
| geophagism | 19 | - | - |
| grangerism | 14 | - | - |
| griffinism | 19 | - | - |
| gombeenism | 17 | - | - |
| gnaphalium | 18 | large widely distributed genus of coarse hairy herbs with whitish involucres | - |
| gradualism | 14 | - | - |
| gormandism | 16 | - | - |
| traitorism | 12 | - | - |
| tirocinium | 14 | - | - |
| trichroism | 17 | pleochroism of a crystal so that it exhibits three different colors when viewed from three different directions | - |
| triclinium | 14 | a dining room (especially a dining room containing a dining table with couches along three sides) | - |
| tricrotism | 14 | - | - |
| trivialism | 15 | - | - |
| tripartism | 14 | - | - |
| triquetrum | 21 | - | - |
| tepidarium | 15 | - | - |
| tentaculum | 14 | - | - |
| tarmacadam | 17 | a paving material of tar and broken stone; mixed in a factory and shaped during paving | - |
| technicism | 19 | - | - |
| technetium | 17 | a crystalline metallic element not found in nature; occurs as one of the fission products of uranium | - |
| threadworm | 19 | small threadlike worm infesting human intestines and rectum especially in children | - |
| textualism | 19 | - | - |
| thalictrum | 17 | widely distributed genus of perennial herbs: meadow rue | - |
| thalliform | 18 | - | - |
| thermogram | 18 | a graphical record produced by a thermograph | - |
| thermoform | 20 | - | - |
| unidealism | 13 | - | - |
| underwhelm | 19 | - | - |
| ureotelism | 12 | - | - |
| utopianism | 14 | the political orientation of a Utopian who believes in impossibly idealistic schemes of social perfection | - |
| vestibulum | 17 | - | - |
| vibraculum | 19 | - | - |
| viperiform | 20 | - | - |
| vaporiform | 20 | - | - |
| warlordism | 16 | - | - |
| virtualism | 15 | - | - |
| vomitorium | 17 | - | - |
| viviparism | 20 | - | - |
| witchbroom | 22 | - | - |
| witgatboom | 18 | - | - |
| westernism | 15 | - | - |
| umbiliform | 19 | - | - |
| umbraculum | 18 | - | - |
| tuberculum | 16 | - | - |
| tuberiform | 17 | - | - |
| tropaeolum | 14 | a tropical American genus of dicotyledonous climbing or diffuse pungent herbs constituting the family Tropaeolaceae | - |
| ypsiliform | 20 | - | - |
| zoophilism | 26 | a sexual attraction to animals | - |
| zoothecium | 26 | - | - |
| phialiform | 20 | - | - |
| phlebogram | 20 | an X ray of a vein injected with a radiopaque contrast medium | - |
| phanerogam | 18 | plant that reproduces by means of seeds not spores | - |
| phelloderm | 18 | - | - |
| phoenixism | 24 | - | - |
| petrolatum | 14 | a semisolid mixture of hydrocarbons obtained from petroleum; used in medicinal ointments and for lubrication | - |
| phallicism | 19 | - | - |
| plasmodesm | 17 | - | - |
| plasmodium | 17 | parasitic protozoan of the genus Plasmodium that causes malaria in humans | - |
| phyllodium | 21 | - | - |
| polarogram | 15 | - | - |
| polemonium | 16 | any plant of the genus Polemonium; most are low-growing often foul-smelling plants of temperate to Arctic regions | - |
| polyparium | 19 | - | - |
| polymerism | 19 | - | - |
| polyrhythm | 26 | - | - |
| polygenism | 18 | - | - |
| poculiform | 19 | - | - |
| pneumogram | 17 | - | - |
| postulatum | 14 | - | - |
| praeludium | 15 | - | - |
| praesidium | 15 | 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 | - |
| praetorium | 14 | the tent of an ancient Roman general | - |
| postbellum | 16 | - | - |
| positivism | 17 | the form of empiricism that bases all knowledge on perceptual experience (not on intuition or revelation) | - |
| preprogram | 17 | - | - |
| presbytism | 19 | - | - |
| presternum | 14 | - | - |
| presentism | 14 | the doctrine that the Scripture prophecies of the Apocalypse (as in the Book of Revelations) are presently in the course of being fulfilled | - |
| prometheum | 19 | - | - |
| promethium | 19 | a soft silvery metallic element of the rare earth group having no stable isotope; was discovered in radioactive form as a fission product of uranium | - |
| prophetism | 19 | - | - |
| propagulum | 17 | - | - |
| primordium | 17 | an organ in its earliest stage of development; the foundation for subsequent development | - |
| principium | 18 | - | - |
| proctodeum | 17 | - | - |
| procambium | 20 | - | - |
| puerperium | 16 | time period following childbirth when the mother's uterus shrinks and the other functional and anatomic changes of pregnancy are resolved | a perinatologist cared for her during the puerperium |
| psychicism | 24 | - | - |
| psychogram | 23 | - | - |
| prostomium | 16 | - | - |
| prostatism | 14 | - | - |
| prosternum | 14 | - | - |
| proteiform | 17 | - | - |
| prosaicism | 16 | - | - |
| propylaeum | 19 | - | - |
| psalterium | 14 | the third compartment of the stomach of a ruminant | - |
| protoxylem | 24 | - | - |
| raduliform | 16 | - | - |
| radiciform | 18 | - | - |
| quadriform | 25 | - | - |
| quadrivium | 25 | (Middle Ages) a higher division of the curriculum in a medieval university involving arithmetic and music and geometry and astronomy | - |
| reaccustom | 16 | - | - |
| refugeeism | 16 | - | - |
| pasteurism | 14 | - | - |
| partialism | 14 | - | - |
| patrialism | 14 | - | - |
| parapodium | 17 | one of a pair of fleshy appendages of a polychete annelid that functions in locomotion and breathing | - |
| paralogism | 15 | an unintentionally invalid argument | - |
| peritoneum | 14 | a transparent membrane that lines the abdominal cavity in mammals and covers most of the viscera | - |
| perigonium | 15 | collective term for the outer parts of a flower consisting of the calyx and corolla and enclosing the stamens and pistils | - |
| peridinium | 15 | type genus of the family Peridiniidae | - |
| periosteum | 14 | a dense fibrous membrane covering the surface of bones (except at their extremities) and serving as an attachment for tendons and muscles; contains nerves and blood vessels that nourish the enclosed bone | - |
| perimysium | 19 | the sheath of connective tissue that covers a bundle of muscle fibers | - |
| pedagogism | 17 | - | - |
| pentaprism | 16 | - | - |
| pentathlum | 17 | - | - |
| schematism | 19 | - | - |
| scintigram | 15 | - | - |
| sarcoplasm | 16 | the cytoplasm of a striated muscle fiber | - |
| sanitorium | 12 | - | - |
| scyphiform | 25 | - | - |
| seaquarium | 21 | - | - |
| seaborgium | 15 | a transuranic element | - |
| seismogram | 15 | the graphical record of an earth tremor made by using a seismograph | - |
| securiform | 17 | - | - |
| sclerotium | 14 | form genus of sterile imperfect fungi; many form sclerotia; some cause sclerotium disease in plants | - |
| scleroderm | 15 | - | - |
| shadchanim | 21 | - | - |
| shadkhanim | 23 | - | - |
| shammashim | 22 | - | - |
| sestertium | 12 | - | - |
| shidduchim | 22 | - | - |
| sheriffdom | 22 | - | - |
| sensualism | 12 | desire for sensual pleasures | - |
| septennium | 14 | - | - |
| sequestrum | 21 | - | - |
| sidestream | 13 | - | - |
| sinecurism | 14 | - | - |
| siphonogam | 18 | - | - |
| sinarquism | 21 | - | - |
| simillimum | 16 | - | - |
| sinarchism | 17 | - | - |
| sparganium | 15 | type and sole genus of Sparganiaceae; marsh or aquatic herbs of temperate regions | - |
| speciesism | 16 | - | - |
| specialism | 16 | the special line of work you have adopted as your career | - |
| solidarism | 13 | - | - |
| spoonerism | 14 | transposition of initial consonants in a pair of words | - |
| sporangium | 15 | organ containing or producing spores | - |
| spongiform | 18 | - | - |
| squamiform | 26 | - | - |
| sphenogram | 18 | - | - |
| spermarium | 16 | - | - |
| spermatium | 16 | - | - |
| speleothem | 17 | - | - |
| spiraculum | 16 | - | - |
| stereogram | 13 | - | - |
| stelliform | 15 | - | - |
| stenotherm | 15 | - | - |
| stibialism | 14 | - | - |
| stichidium | 18 | - | - |
| stilliform | 15 | - | - |
| stigmatism | 15 | normal eyesight | - |
| strychnism | 20 | - | - |
| strigiform | 16 | - | - |
| stripagram | 15 | - | - |
| stomodaeum | 15 | - | - |
| streetroom | 12 | - | - |
| stramonium | 14 | - | - |
| stratiform | 15 | - | - |
| sulphonium | 17 | - | - |
| sudatorium | 13 | a bathhouse for hot air baths or steam baths | - |
| suffragism | 19 | the belief that the right to vote should be extended (as to women) | - |
| subkingdom | 20 | (biology) a taxonomic group comprising a major division of a kingdom | - |
| subsellium | 14 | - | - |
| substratum | 14 | any stratum or layer lying underneath another | - |
| suboptimum | 18 | - | - |
| subprogram | 17 | a set sequence of steps, part of larger computer program | - |
| subproblem | 18 | - | - |
| surrogatum | 13 | - | - |
| synthetism | 18 | a genre of French painting characterized by bright flat shapes and symbolic treatments of abstract ideas | - |
| sybaritism | 17 | - | - |
| syncretism | 17 | the fusion of originally different inflected forms (resulting in a reduction in the use of inflections) | - |
| symphilism | 22 | - | - |
| synandrium | 16 | - | - |
| revivalism | 18 | an attempt to reawaken the evangelical faith | - |
| reunionism | 12 | - | - |
| revanchism | 20 | - | - |
| saddleroom | 14 | - | - |
| salverform | 18 | of or concerning a gamopetalous that has a slender tube and an abruptly expanded tip | - |
| samariform | 17 | - | - |
| salicylism | 17 | - | - |
| ruffianism | 18 | violent lawless behavior | - |
| messianism | 14 | - | - |
| metamerism | 16 | - | - |
| mesomerism | 16 | - | - |
| maudlinism | 15 | - | - |
| meitnerium | 14 | a radioactive transuranic element | - |
| meerschaum | 19 | a white clayey mineral | - |
| medusiform | 18 | - | - |
| milksopism | 20 | - | - |
| minimalism | 16 | an art movement in sculpture and painting that began in the 1950s and emphasized extreme simplification of form and color | - |
| miracidium | 17 | - | - |
| millstream | 14 | - | - |
| microseism | 16 | a small earthquake | - |
| microprism | 18 | - | - |
| misprogram | 17 | - | - |
| monopodium | 17 | - | - |
| monopolism | 16 | - | - |
| monosodium | 15 | - | - |
| monorchism | 19 | failure of one testes to descend into the scrotum | - |
| morphinism | 19 | - | - |
| monarchism | 19 | a belief in and advocacy of monarchy as a political system | - |
| monadiform | 18 | - | - |
| moderatism | 15 | a political philosophy of avoiding the extremes of left and right by taking a moderate position or course of action | - |
| monogenism | 15 | - | - |
| mongrelism | 15 | - | - |
| monetarism | 14 | an economic theory holding that variations in unemployment and the rate of inflation are usually caused by changes in the supply of money | - |
| moniliform | 17 | - | - |
| mytiliform | 20 | - | - |
| myocardium | 20 | the middle muscular layer of the heart wall | - |
| mugwumpism | 22 | - | - |
| nephridium | 18 | - | - |
| neorealism | 12 | - | - |
| nicotinism | 14 | - | - |
| nidamentum | 15 | - | - |
| neutralism | 12 | a policy of neutrality or nonalignment in international affairs | - |
| neuroplasm | 14 | - | - |
| natatorium | 12 | pool that provides a facility for swimming | - |
| negativism | 16 | characterized by habitual skepticism and a disagreeable tendency to deny or oppose or resist suggestions or commands | - |
| nonproblem | 16 | - | - |
| nonprogram | 15 | - | - |
