11-letter words ending with M
Dive into the specific realm of 11-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 |
|---|---|---|---|
| bloodstream | 16 | the blood flowing through the circulatory system | - |
| imperialism | 17 | any instance of aggressive extension of authority | - |
| equilibrium | 24 | a sensory system located in structures of the inner ear that registers the orientation of the head | - |
| crematorium | 17 | a furnace where a corpse can be burned and reduced to ashes | - |
| nationalism | 13 | love of country and willingness to sacrifice for it | British nationalism was in the air and patriotic sentiments ran high |
| cannibalism | 17 | the practice of eating the flesh of your own kind | - |
| romanticism | 17 | an exciting and mysterious quality (as of a heroic time or adventure) | - |
| catholicism | 20 | the beliefs and practices of a Catholic Church | - |
| condominium | 18 | one of the dwelling units in a condominium | - |
| materialism | 15 | a desire for wealth and material possessions with little interest in ethical or spiritual matters | - |
| pandemonium | 18 | a state of extreme confusion and disorder | - |
| planetarium | 15 | a building housing an instrument for projecting the positions of the planets onto a domed ceiling | - |
| colonialism | 15 | exploitation by a stronger country of weaker one; the use of the weaker country's resources to strengthen and enrich the stronger country | - |
| consumerism | 17 | a movement advocating greater protection of the interests of consumers | - |
| hooliganism | 17 | willful wanton and malicious destruction of the property of others | - |
| magisterium | 16 | - | - |
| athleticism | 18 | intense energy | his music is characterized by a happy athleticism |
| antifascism | 18 | - | - |
| creationism | 15 | the literal belief in the account of Creation given in the Book of Genesis | creationism denies the theory of evolution of species |
| absenteeism | 15 | habitual absence from work | - |
| astigmatism | 16 | (optics) defect in an optical system in which light rays from a single point fail to converge in a single focal point | - |
| anachronism | 18 | something located at a time when it could not have existed or occurred | - |
| determinism | 16 | (philosophy) a philosophical theory holding that all events are inevitable consequences of antecedent sufficient causes; often understood as denying the possibility of free will | - |
| favouritism | 19 | an inclination to favor some person or group | - |
| revisionism | 16 | a moderate evolutionary form of Marxism | - |
| scriptorium | 17 | a room in a monastery that is set aside for writing or copying manuscripts | - |
| infantilism | 16 | an abnormal condition in which an older child or adult retains infantile characteristics | - |
| monasticism | 17 | asceticism as a form of religious life; usually conducted in a community under a common rule and characterized by celibacy and poverty and obedience | - |
| pericardium | 18 | a serous membrane with two layers that surrounds the heart | - |
| rationalism | 13 | the doctrine that reason is the right basis for regulating conduct | - |
| behaviorism | 21 | an approach to psychology that emphasizes observable measurable behavior | - |
| agnosticism | 16 | the disbelief in any claims of ultimate knowledge | - |
| officialdom | 22 | people elected or appointed to administer a government | - |
| opportunism | 17 | taking advantage of opportunities without regard for the consequences for others | - |
| parallelism | 15 | similarity by virtue of corresponding | - |
| clostridium | 16 | spindle-shaped bacterial cell especially one swollen at the center by an endospore | - |
| esotericism | 15 | - | - |
| bachelordom | 21 | - | - |
| candelabrum | 18 | branched candlestick; ornamental; has several lights | - |
| endometrium | 16 | (pregnancy) the mucous membrane that lines the uterus; thickens under hormonal control and (if pregnancy does not occur) is shed in menstruation; if pregnancy occurs it is shed along with the placenta at parturition | - |
| mesothorium | 18 | - | - |
| primitivism | 20 | a wild or unrefined state | - |
| gourmandism | 17 | the disposition and habits of a gourmand | - |
| vigilantism | 17 | the actions of a vigilance committee in trying to enforce the laws | - |
| apoliticism | 17 | - | - |
| apodyterium | 19 | - | - |
| apotropaism | 17 | - | - |
| antielitism | 13 | - | - |
| antheridium | 17 | the male sex organ of spore-producing plants; produces antherozoids; equivalent to the anther in flowers | - |
| antependium | 16 | - | - |
| antenniform | 16 | - | - |
| antirrhinum | 16 | a genus of herbs of the family Scrophulariaceae with brightly colored irregular flowers | - |
| antirealism | 13 | - | - |
| aspersorium | 15 | a short-handled device with a globe containing a sponge; used for sprinkling holy water | - |
| aspheterism | 18 | - | - |
| aspergillum | 16 | - | - |
| attorneydom | 17 | - | - |
| attorneyism | 16 | - | - |
| archegonium | 19 | a female sex organ occurring in mosses, ferns, and most gymnosperms | - |
| archdukedom | 24 | - | - |
| asbestiform | 18 | - | - |
| arteriogram | 14 | an X ray of an artery filled with a contrast medium | - |
| bacilliform | 20 | formed like a bacillus | - |
| autoerotism | 13 | using you own body as a sexual object | - |
| bachelorism | 20 | - | - |
| bohemianism | 20 | conduct characteristic of a bohemian | - |
| bimetallism | 17 | a monetary standard under which the basic unit of currency is defined by stated amounts of two metals (usually gold and silver) with values set at a predetermined ratio | - |
| bisexualism | 22 | - | - |
| biracialism | 17 | - | - |
| bryophyllum | 26 | - | - |
| brachyprism | 25 | - | - |
| braggartism | 17 | - | - |
| capillitium | 17 | - | - |
| caprolactam | 19 | - | - |
| calcariform | 20 | - | - |
| californium | 18 | a radioactive transuranic element; discovered by bombarding curium with alpha particles | - |
| cabbageworm | 23 | toxic green larva of a cabbage butterfly | - |
| campaniform | 22 | - | - |
| cavalierism | 18 | - | - |
| cerebralism | 17 | - | - |
| cerebriform | 20 | - | - |
| cassiopeium | 17 | - | - |
| carpogonium | 18 | - | - |
| catheterism | 18 | - | - |
| cognitivism | 19 | - | - |
| coenobitism | 17 | - | - |
| clinandrium | 16 | - | - |
| clickstream | 21 | - | - |
| clericalism | 17 | a policy of supporting the influence and power of the clergy in secular or political matters | - |
| computerdom | 20 | - | - |
| comstockism | 23 | - | - |
| cologarithm | 19 | - | - |
| communalism | 19 | loyalty and commitment to the interests of your own minority or ethnic group rather than to society as a whole | - |
| colubriform | 20 | - | - |
| columbarium | 19 | a birdhouse for pigeons | - |
| agritourism | 14 | - | - |
| agrarianism | 14 | - | - |
| agrotourism | 14 | - | - |
| allotropism | 15 | the phenomenon of an element existing in two or more physical forms | - |
| aerotropism | 15 | - | - |
| adventurism | 17 | recklessness in politics or foreign affairs | - |
| anamorphism | 20 | the evolution of one type of organism from another by a long series of gradual changes | - |
| animalculum | 17 | microscopic organism such as an amoeba or paramecium | - |
| ametabolism | 17 | - | - |
| acinaciform | 20 | - | - |
| achromatism | 20 | the visual property of being without chromatic color | - |
| adoptionism | 16 | - | - |
| adoptianism | 16 | - | - |
| adiaphorism | 19 | - | - |
| abnormalism | 17 | - | - |
| academicism | 20 | orthodoxy of a scholastic variety | - |
| livermorium | 18 | - | - |
| dynasticism | 19 | - | - |
| homoeotherm | 21 | - | - |
| reptiliform | 18 | - | - |
| roentgenium | 14 | a radioactive transuranic element | - |
| passeriform | 18 | - | - |
| clicktivism | 24 | - | - |
| copernicium | 19 | - | - |
| buttercream | 17 | - | - |
| strippagram | 18 | - | - |
| slacktivism | 22 | - | - |
| biocentrism | 17 | - | - |
| originalism | 14 | the belief that the United States Constitution should be interpreted in the way the authors originally intended it | - |
| megastardom | 17 | - | - |
| gymnatorium | 19 | - | - |
| definiendum | 18 | - | - |
| cypripedium | 23 | genus of chiefly American perennial leafy-stemmed orchids: lady's slippers; sometimes includes species of genus Paphiopedilum | - |
| dactylogram | 20 | - | - |
| demoniacism | 18 | - | - |
| demonianism | 16 | - | - |
| demagoguism | 18 | - | - |
| diachronism | 19 | - | - |
| diascordium | 17 | - | - |
| didactylism | 20 | - | - |
| digoneutism | 15 | - | - |
| didacticism | 19 | communication that is suitable for or intended to be instructive | the didacticism expected in books for the young |
| dicephalism | 21 | - | - |
| diatonicism | 16 | - | - |
| desideratum | 15 | something desired as a necessity | - |
| deteriorism | 14 | - | - |
| diphysitism | 22 | - | - |
| dihybridism | 23 | - | - |
| diluvialism | 17 | - | - |
| dinotherium | 17 | - | - |
| disaccustom | 18 | - | - |
| ditheletism | 17 | - | - |
| dithelitism | 17 | - | - |
| disyllabism | 19 | - | - |
| diversiform | 20 | - | - |
| dogberryism | 20 | - | - |
| dolabriform | 19 | having the shape of the head of an ax or cleaver | - |
| divisionism | 17 | - | - |
| egocentrism | 16 | concern for your own interests and welfare | - |
| ecofeminism | 20 | - | - |
| eclecticism | 19 | making decisions on the basis of what seems best instead of following some single doctrine or style | - |
| ecumenicism | 19 | (Christianity) the doctrine of the ecumenical movement that promotes cooperation and better understanding among different religious denominations: aimed at universal Christian unity | - |
| dramaticism | 18 | - | - |
| endocardium | 17 | the membrane that lines the cavities of the heart and forms part of the heart valves | - |
| endocranium | 16 | membrane lining the inside of the skull | - |
| endoneurium | 14 | delicate connective tissue around individual nerve fibers in nerve | - |
| electroform | 18 | - | - |
| electrogram | 16 | - | - |
| einsteinium | 13 | a radioactive transuranic element produced by bombarding plutonium with neutrons | - |
| epigastrium | 16 | the region lying on or over the stomach (just below the sternum) | - |
| endothecium | 19 | - | - |
| endothelium | 17 | an epithelium of mesoblastic origin; a thin layer of flattened cells that lines the inside of some body cavities | - |
| exclusivism | 25 | - | - |
| excrementum | 24 | - | - |
| estheticism | 18 | - | - |
| erythronium | 19 | perennial bulbous herbs most of northern United States: dogtooth violet; adder's tongue; trout lily; fawn lily | - |
| eudaimonism | 16 | - | - |
| eudaemonism | 16 | - | - |
| eubacterium | 17 | a large group of bacteria having rigid cell walls; motile types have flagella | - |
| fallibilism | 18 | - | - |
| falconiform | 21 | - | - |
| exotericism | 22 | - | - |
| externalism | 20 | - | - |
| florilegium | 17 | an anthology of short literary pieces and poems and ballads etc. | - |
| fissiparism | 18 | - | - |
| funambulism | 20 | walking on a tightrope or slack rope | - |
| freneticism | 18 | - | - |
| frigidarium | 18 | - | - |
| formicarium | 20 | - | - |
| corrigendum | 17 | a printer's error; to be corrected | - |
| cosmeticism | 19 | - | - |
| corybantism | 20 | - | - |
| corolliform | 18 | - | - |
| corporatism | 17 | control of a state or organization by large interest groups | individualism is in danger of being swamped by a kind of corporatism |
| cosmotheism | 20 | - | - |
| coraciiform | 20 | - | - |
| coralliform | 18 | - | - |
| cryptarithm | 23 | - | - |
| courtierism | 15 | - | - |
| creatianism | 15 | - | - |
| crateriform | 18 | - | - |
| monothelism | 18 | - | - |
| monoclinism | 17 | - | - |
| monochasium | 20 | - | - |
| mythopoeism | 23 | - | - |
| naupliiform | 18 | - | - |
| multisystem | 18 | - | - |
| muscatorium | 17 | - | - |
| nonaluminum | 15 | - | - |
| neovitalism | 16 | - | - |
| neopaganism | 16 | - | - |
| neuroticism | 15 | a mental or personality disturbance not attributable to any known neurological or organic dysfunction | - |
| objectivism | 27 | - | - |
| noumenalism | 15 | - | - |
| nototherium | 16 | - | - |
| nucleoplasm | 17 | the protoplasm that constitutes the nucleus of a cell | - |
| nonunionism | 13 | - | - |
| notaphilism | 18 | - | - |
| northernism | 16 | - | - |
| ostensorium | 13 | (Roman Catholic Church) a vessel (usually of gold or silver) in which the consecrated Host is exposed for adoration | - |
| oscillogram | 16 | the recording produced by an oscillograph | - |
| orientalism | 13 | the scholarly knowledge of Asian cultures and languages and people | - |
| ostracoderm | 16 | extinct fish-like jawless vertebrate having a heavily armored body; of the Paleozoic | - |
| officialism | 21 | - | - |
| organistrum | 14 | - | - |
| ophidiarium | 19 | - | - |
| overfreedom | 20 | - | - |
| overprogram | 19 | - | - |
| parascenium | 17 | - | - |
| patelliform | 18 | shaped like a dish or pan | - |
| pastoralism | 15 | - | - |
| paternalism | 15 | the attitude (of a person or a government) that subordinates should be controlled in a fatherly way for their own good | - |
| parabaptism | 19 | - | - |
| papilliform | 20 | shaped like a papilla | - |
| panentheism | 18 | - | - |
| panduriform | 19 | (of a leaf shape) having rounded ends and a contracted center | - |
| panpsychism | 25 | - | - |
| panspermism | 19 | - | - |
| panislamism | 17 | - | - |
| panjandarum | 23 | - | - |
| paramaecium | 19 | - | - |
| paramoecium | 19 | - | - |
| perineurium | 15 | the sheath of connective tissue that covers a bundle of nerve fibers | - |
| perithecium | 20 | flask-shaped ascocarp | - |
| peritonaeum | 15 | - | - |
| pericranium | 17 | - | - |
| peridesmium | 18 | - | - |
| pedagoguism | 18 | - | - |
| pedanticism | 18 | - | - |
| penicillium | 17 | genus of fungi commonly growing as green or blue molds on decaying food; used in making cheese and as a source of penicillin | - |
| pentamerism | 17 | - | - |
| pelargonium | 16 | geraniums native chiefly to South Africa; widely cultivated | - |
| phoneticism | 20 | - | - |
| phariseeism | 18 | - | - |
| phenomenism | 20 | - | - |
| photosystem | 21 | - | - |
| phosphonium | 23 | - | - |
| phosphorism | 23 | - | - |
| personalism | 15 | - | - |
| phagocytism | 24 | - | - |
| planuliform | 18 | - | - |
| pittosporum | 17 | - | - |
| plebeianism | 17 | - | - |
| pleochroism | 20 | the phenomenon of different colors appearing when certain crystals are viewed from different directions | - |
| pleinairism | 15 | - | - |
| physitheism | 24 | - | - |
| phraseogram | 19 | - | - |
| physicalism | 23 | (philosophy) the philosophical theory that matter is the only reality | - |
| polyzoarium | 27 | - | - |
| postscenium | 17 | - | - |
| positronium | 15 | - | - |
| possibilism | 17 | - | - |
| pointillism | 15 | a genre of painting characterized by the application of paint in dots and small strokes; developed by Georges Seurat and his followers in late 19th century France | - |
| podophyllum | 24 | perennial rhizomatous herbs | - |
| polyglotism | 19 | - | - |
| polymastism | 20 | - | - |
| polygonatum | 19 | sometimes placed in subfamily Convallariaceae | - |
| polycrotism | 20 | - | - |
| polychasium | 23 | - | - |
| polychroism | 23 | - | - |
| meteorogram | 16 | - | - |
| mendelevium | 19 | a radioactive transuranic element synthesized by bombarding einsteinium with alpha particles (Md is the current symbol for mendelevium but Mv was formerly the symbol) | - |
| menispermum | 19 | climbing herbs | - |
| mesothelium | 18 | epithelium originating in the embryonic mesoderm; lines the primordial body cavity | - |
| mercenarism | 17 | - | - |
| miserablism | 17 | - | - |
| millenarism | 15 | belief in the Christian doctrine of the millennium mentioned in the Book of Revelations | - |
| ministerium | 15 | - | - |
| prothallium | 18 | - | - |
| proselytism | 18 | the practice of proselytizing | - |
| protagonism | 16 | active support of an idea or cause etc.; especially the act of pleading or arguing for something | - |
| protophloem | 20 | - | - |
| reactionism | 15 | the political orientation of reactionaries | - |
| quadrennium | 23 | a period of four years | - |
| quislingism | 23 | act of cooperating traitorously with an enemy that is occupying your country | - |
| religionism | 14 | exaggerated or affected piety and religious zeal | - |
| regionalism | 14 | a feature (as a pronunciation or expression or custom) that is characteristic of a particular region | - |
| relationism | 13 | - | - |
| retinaculum | 15 | - | - |
| retransform | 16 | - | - |
| sacculiform | 20 | - | - |
| rhagadiform | 21 | - | - |
| rheotropism | 18 | - | - |
| scattergram | 16 | - | - |
| scalpriform | 20 | - | - |
| scalariform | 18 | - | - |
| scoleciform | 20 | - | - |
| sagittiform | 17 | (of a leaf shape) like an arrow head without flaring base lobes | - |
| satellitium | 13 | - | - |
| sardonicism | 16 | - | - |
| sempervivum | 23 | - | - |
| sempiternum | 17 | - | - |
| sericterium | 15 | silk-producing gland of insects (especially of a silkworm) or spiders | - |
| scripturism | 17 | - | - |
| shunamitism | 18 | - | - |
| singularism | 14 | - | - |
| shopaholism | 21 | - | - |
| sociologism | 16 | - | - |
| southernism | 16 | a locution or pronunciation peculiar to the southern United States | - |
| somatoplasm | 17 | - | - |
| sporogonium | 16 | - | - |
| spectrogram | 18 | a photographic record of a spectrum | - |
| sphygmogram | 25 | - | - |
| spinsterdom | 16 | - | - |
| spiraliform | 18 | - | - |
| spelaeothem | 18 | - | - |
| sphaeridium | 19 | - | - |
| stipitiform | 18 | - | - |
| staminodium | 16 | - | - |
| steganogram | 15 | - | - |
| progressism | 16 | - | - |
| prognathism | 19 | the condition of being prognathous; the condition of having a projecting jaw | - |
| promycelium | 22 | the basidium of various fungi | - |
| procerebrum | 19 | - | - |
| prochronism | 20 | - | - |
| proctodaeum | 18 | - | - |
| probabilism | 19 | a Roman Catholic system of casuistry that when expert opinions differ an actor can follow any solidly probable opinion that he wishes even though some different opinion might be more probable | - |
| halophytism | 24 | - | - |
| gutturalism | 14 | - | - |
| gynostemium | 19 | - | - |
| guerillaism | 14 | - | - |
| hemihedrism | 22 | - | - |
| hemitropism | 20 | - | - |
| hermeticism | 20 | - | - |
| heteroecism | 18 | - | - |
| hesperidium | 19 | - | - |
| harmonogram | 19 | - | - |
| helichrysum | 24 | large genus of mostly African and Australian herbs and shrubs: everlasting flowers; in some classifications includes genus Ozothamnus | - |
| hormogonium | 19 | - | - |
| homoiotherm | 21 | an animal that has a body temperature that is relatively constant and independent of the environmental temperature | - |
| hucksterism | 22 | - | - |
| hippeastrum | 20 | amaryllis of tropical America often cultivated as a houseplant for its showy white to red flowers | - |
| hispanicism | 20 | - | - |
| hierarchism | 21 | - | - |
| highbrowism | 25 | - | - |
| holohedrism | 20 | - | - |
| holophytism | 24 | - | - |
| homoerotism | 18 | - | - |
| histrionism | 16 | - | - |
| historicism | 18 | a theory that social and cultural events are determined by history | - |
| hydrargyrum | 24 | a heavy silvery toxic univalent and bivalent metallic element; the only metal that is liquid at ordinary temperatures | - |
| hyperbolism | 23 | - | - |
| hydroxonium | 27 | - | - |
| hylopathism | 24 | - | - |
| illusionism | 13 | - | - |
| immanentism | 17 | - | - |
| immediatism | 18 | - | - |
| infusionism | 16 | - | - |
| incunabulum | 17 | - | - |
| interregnum | 14 | the time between two reigns, governments, etc. | - |
| intermedium | 16 | - | - |
| insectarium | 15 | - | - |
| insectiform | 18 | - | - |
| inquilinism | 22 | - | - |
| isochronism | 18 | - | - |
| isogeotherm | 17 | - | - |
| irredentism | 14 | the doctrine that irredenta should be controlled by the country to which they are ethnically or historically related | - |
| isomorphism | 20 | (biology) similarity or identity of form or shape or structure | - |
| intrapartum | 15 | - | - |
| intersystem | 16 | - | - |
| intervallum | 16 | - | - |
| ipratropium | 17 | - | - |
| intuitivism | 16 | - | - |
| lamelliform | 18 | - | - |
| landlordism | 15 | - | - |
| libertinism | 15 | - | - |
| latifundium | 17 | - | - |
| latrocinium | 15 | - | - |
| larrikinism | 17 | - | - |
| lapilliform | 18 | - | - |
| leprosarium | 15 | - | - |
| macrophylum | 25 | - | - |
| maggotorium | 17 | - | - |
| literaryism | 16 | - | - |
| lubritorium | 15 | - | - |
| maternalism | 15 | the quality of having or showing the tenderness and warmth and affection of or befitting a mother | - |
| martinetism | 15 | - | - |
| mediastinum | 16 | the part of the thoracic cavity between the lungs that contains the heart and aorta and esophagus and trachea and thymus | - |
| medievalism | 19 | - | - |
| mamilliform | 20 | - | - |
| mandarinism | 16 | - | - |
| malapropism | 19 | the unintentional misuse of a word by confusion with one that sounds similar | - |
| marconigram | 18 | - | - |
| marginalism | 16 | - | - |
| manorialism | 15 | - | - |
| gangsterdom | 16 | - | - |
| gangsterism | 15 | - | - |
| gamotropism | 18 | - | - |
| gametangium | 17 | cell or organ in which gametes develop | - |
| gorillagram | 15 | - | - |
| granuliform | 17 | - | - |
| granitiform | 17 | - | - |
| systematism | 18 | the habitual practice of systematization and classification | - |
| syllabarium | 18 | - | - |
| synchronism | 21 | the relation that exists when things occur at the same time | - |
| syndicalism | 19 | a radical political movement that advocates bringing industry and government under the control of labor unions | - |
| syllabogram | 19 | - | - |
| symmetalism | 20 | - | - |
| termitarium | 15 | - | - |
| tetratheism | 16 | - | - |
| tetrazolium | 22 | - | - |
| tetramerism | 15 | - | - |
| tetradrachm | 19 | - | - |
| teetotalism | 13 | abstaining from alcohol | - |
| tautologism | 14 | - | - |
| tautomerism | 15 | - | - |
| taurobolium | 15 | - | - |
| teleologism | 14 | - | - |
| succedaneum | 18 | (medicine) something that can be used as a substitute (especially any medicine that may be taken in place of another) | - |
| suburbanism | 17 | - | - |
| stylopodium | 19 | an enlargement at the base of the style in some Umbelliferae | - |
| subdelirium | 16 | - | - |
| supersystem | 18 | - | - |
| suppedaneum | 18 | - | - |
| superorgasm | 16 | - | - |
| superphylum | 23 | (biology) a taxonomic group ranking between a phylum and below a class or subclass | - |
| survivalism | 19 | - | - |
| supremacism | 19 | the belief that some particular group or race is superior to all others | white supremacism |
| suprematism | 17 | a geometric abstractionist movement originated by Kazimir Malevich in Russia that influenced constructivism | - |
| tympaniform | 23 | - | - |
| ultravacuum | 18 | - | - |
| trophoplasm | 20 | - | - |
| tschernosem | 18 | - | - |
| unnilhexium | 23 | - | - |
| vagabondism | 20 | - | - |
| uricotelism | 15 | - | - |
| unsocialism | 15 | - | - |
| vasculiform | 21 | - | - |
| vanguardism | 18 | - | - |
| verruciform | 21 | - | - |
| werewolfism | 22 | - | - |
| whiteboyism | 24 | - | - |
| voluntarism | 16 | - | - |
| theosophism | 21 | belief in theosophy | - |
| theatricism | 18 | - | - |
| thirdstream | 17 | - | - |
| trapeziform | 27 | - | - |
| tridominium | 16 | - | - |
| trimorphism | 20 | - | - |
| xeranthemum | 25 | any plant of the genus Xeranthemum native to southern Europe having chaffy or silvery flower heads with purplish tubular flowers | - |
| xenodochium | 26 | - | - |
| xerophytism | 28 | - | - |
| zoospermium | 26 | - | - |
| zoomorphism | 29 | the attribution of animal forms or qualities to a god | - |
| zeolitiform | 25 | - | - |
| zanthoxylum | 35 | deciduous or evergreen trees or shrubs: prickly ash | - |
| zoogonidium | 24 | - | - |
| zoodendrium | 24 | - | - |
| workaholism | 23 | compulsiveness about working | - |
