9-letter words ending with UM
Dive into the specific realm of 9-letter words that conclude with the letter UM. This focused section reveals the fascinating ways in which words of this particular length, ending with UM, 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 |
|---|---|---|---|
| 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 | - |
| 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 | - |
| 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 | - |
| 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) | - |
| 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 | - |
| conundrum | 14 | a difficult problem | - |
| harmonium | 16 | a free-reeded instrument with a piano keyboard in which air is forced through the reeds by bellows | - |
| aluminium | 13 | a silvery ductile metallic element found primarily in bauxite | - |
| sugarplum | 14 | any of various small sugary candies | - |
| colosseum | 13 | a large amphitheater in Rome whose construction was begun by Vespasian about AD 75 or 80 | - |
| 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 | - |
| 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 | - |
| terrarium | 11 | a vivarium in which selected living plants are kept and observed | - |
| 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 | - |
| antiserum | 11 | blood serum containing antibodies against specific antigens; provides immunity to a disease | - |
| strontium | 11 | a soft silver-white or yellowish metallic element of the alkali metal group; turns yellow in air; occurs in celestite and strontianite | - |
| euphonium | 16 | a bass horn (brass wind instrument) that is the tenor of the tuba family | - |
| sensorium | 11 | the areas of the brain that process and register incoming sensory information and make possible the conscious awareness of the world | - |
| deuterium | 12 | an isotope of hydrogen which has one neutron (as opposed to zero neutrons in hydrogen) | - |
| practicum | 17 | - | - |
| 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 | - |
| 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 | - |
| athenaeum | 14 | a literary or scientific association for the promotion of learning | - |
| arboretum | 13 | a facility where trees and shrubs are cultivated for exhibition | - |
| molluscum | 15 | any skin disease characterized by soft pulpy nodules | - |
| 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 | - | - |
| neptunium | 13 | a radioactive transuranic metallic element; found in trace amounts in uranium ores; a by-product of the production of plutonium | - |
| nymphaeum | 21 | - | - |
| 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 | - |
| paramylum | 18 | - | - |
| pastorium | 13 | - | - |
| menstruum | 13 | the monthly discharge of blood from the uterus of nonpregnant women from puberty to menopause | - |
| mazaedium | 23 | - | - |
| ytterbium | 16 | a soft silvery metallic element; a rare earth of the lanthanide series; it occurs in gadolinite and monazite and xenotime | - |
| zygantrum | 24 | - | - |
| zoocytium | 25 | - | - |
| vulsellum | 14 | - | - |
| virginium | 15 | - | - |
| viticetum | 16 | - | - |
| sargassum | 12 | brown algae with rounded bladders forming dense floating masses in tropical Atlantic waters as in the Sargasso Sea | - |
| sarmentum | 13 | - | - |
| salicetum | 13 | - | - |
| scutellum | 13 | - | - |
| sensillum | 11 | - | - |
| separatum | 13 | - | - |
| septarium | 13 | - | - |
| spirillum | 13 | any flagellated aerobic bacteria having a spirally twisted rodlike form | - |
| sporidium | 14 | - | - |
| stomodeum | 14 | - | - |
| rhipidium | 17 | - | - |
| rhizobium | 25 | the type genus of Rhizobiaceae; usually occur in the root nodules of legumes; can fix atmospheric oxygen | - |
| ruthenium | 14 | a rare polyvalent metallic element of the platinum group; it is found associated with platinum | - |
| sagapenum | 14 | - | - |
| saccharum | 18 | tall perennial reedlike grass originally of southeastern Asia: sugarcane | - |
| sacrarium | 13 | - | - |
| rostellum | 11 | - | - |
| sympodium | 19 | - | - |
| synangium | 15 | - | - |
| 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) | - |
| 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 | - |
| tenaculum | 13 | - | - |
| taraxacum | 20 | an asterid dicot genus of the family Compositae including dandelions | - |
| tormentum | 13 | - | - |
| trapezium | 22 | the wrist bone on the thumb side of the hand that articulates with the 1st and 2nd metacarpals | - |
| triennium | 11 | - | - |
| trifolium | 14 | any leguminous plant having leaves divided into three leaflets | - |
| triforium | 14 | - | - |
| tripudium | 14 | - | - |
| trisodium | 12 | - | - |
| unguentum | 12 | - | - |
| unununium | 11 | - | - |
| 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 | - |
| verbascum | 18 | genus of coarse herbs and subshrubs mostly with woolly leaves | - |
| vestigium | 15 | - | - |
| sulfonium | 14 | - | - |
| subphylum | 21 | (biology) a taxonomic group ranking between a phylum and a class | - |
| submentum | 15 | - | - |
| polygonum | 17 | diverse genus of herbs or woody subshrubs of north temperate regions | - |
| pollinium | 13 | a coherent mass of pollen grains (as in orchids) | - |
| pomoerium | 15 | - | - |
| prescutum | 15 | - | - |
| propodeum | 16 | - | - |
| prooemium | 15 | - | - |
| purdonium | 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 | - | - |
| 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 | - |
| pycnidium | 19 | flask-shaped asexual structure containing conidia | - |
| quaesitum | 20 | - | - |
| reddendum | 14 | - | - |
| reptilium | 13 | - | - |
| reticulum | 13 | the second compartment of the stomach of a ruminant | - |
| responsum | 13 | - | - |
| perinaeum | 13 | - | - |
| hydronium | 18 | - | - |
| hordeolum | 15 | an infection of the sebaceous gland of the eyelid | - |
| hospitium | 16 | - | - |
| hypogaeum | 20 | - | - |
| 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 | - |
| indecorum | 14 | an act of undue intimacy | - |
| impluvium | 18 | - | - |
| lanthanum | 14 | a white soft metallic element that tarnishes readily; occurs in rare earth minerals and is usually classified as a rare earth | - |
| magnalium | 14 | - | - |
| martyrium | 16 | - | - |
| marsupium | 15 | an external abdominal pouch in most marsupials where newborn offspring are suckled | - |
| manubrium | 15 | the upper part of the breastbone | - |
| helvetium | 17 | - | - |
| herbarium | 16 | a collection of dried plants that are mounted and systematically classified for study | - |
| hieracium | 16 | large genus of perennial hairy herbs of Europe to western Asia to northwestern Africa and North America; few are ornamental; often considered congeneric with Pilosella | - |
| contagium | 14 | - | - |
| cormidium | 16 | - | - |
| criterium | 13 | a bicycle race held on a short course (usually less than 5 km or 3 miles) | - |
| ctenidium | 14 | comb-like respiratory structure serving as the gill of certain mollusks | - |
| credendum | 15 | (Christianity) any of the sections into which a creed or other statement of doctrine is divided | - |
| cribellum | 15 | - | - |
| cubiculum | 17 | - | - |
| decennium | 14 | a period of 10 years | - |
| dentalium | 12 | - | - |
| deliquium | 21 | a spontaneous loss of consciousness caused by insufficient blood to the brain | - |
| diachylum | 20 | - | - |
| diacodium | 15 | - | - |
| diazonium | 21 | the univalent cation R-N:N- (where R is an aromatic hydrocarbon); found in salts that are used in manufacturing azo dyes | - |
| diatretum | 12 | - | - |
| desmodium | 15 | beggarweed; tick trefoil | - |
| dichasium | 17 | - | - |
| drepanium | 14 | - | - |
| doronicum | 14 | genus of Eurasian perennial tuberous or rhizomatous herbs: leopard's bane | - |
| effluvium | 20 | a foul-smelling outflow or vapor (especially a gaseous waste) | - |
| ectropium | 15 | - | - |
| elaterium | 11 | - | - |
| coenobium | 15 | - | - |
| colchicum | 20 | chiefly fall-blooming perennial cormous herbs; sometimes placed in family Colchicaceae | - |
| coccidium | 18 | parasitic on the digestive epithelium of vertebrates and higher invertebrates | - |
| colostrum | 13 | milky fluid secreted for the first day or two after parturition | - |
| collegium | 14 | - | - |
| collodium | 14 | - | - |
| colluvium | 16 | - | - |
| columbium | 17 | a former name for niobium | - |
| combretum | 17 | any of numerous shrubs or small trees of the genus Combretum having spikes of small flowers | - |
| excambium | 24 | - | - |
| excerptum | 22 | - | - |
| fastigium | 15 | - | - |
| flabellum | 16 | - | - |
| flagellum | 15 | a whip used to inflict punishment (often used for pedantic humor) | - |
| gastraeum | 12 | - | - |
| gelsemium | 14 | evergreen twining shrubs of Americas and southeastern Asia | - |
| glucinium | 14 | a light strong brittle grey toxic bivalent metallic element | - |
| gynoecium | 17 | a female gametoecium | - |
| gynaeceum | 17 | - | - |
| gynaecium | 17 | - | - |
| endosteum | 12 | vascular membrane that lines the inner surface of long bones | - |
| emplectum | 17 | - | - |
| encolpium | 15 | - | - |
| epilobium | 15 | large widely distributed genus of herbs and subshrubs of especially western North America and Arctic areas | - |
| epimysium | 18 | - | - |
| epicedium | 16 | - | - |
| equisetum | 20 | horsetails; coextensive with the family Equisetaceae | - |
| entropium | 13 | - | - |
| barathrum | 16 | - | - |
| beryllium | 16 | a light strong brittle grey toxic bivalent metallic element | - |
| berkelium | 17 | a radioactive transuranic element; discovered by bombarding americium with helium | - |
| botulinum | 13 | anaerobic bacterium producing botulin the toxin that causes botulism | - |
| bronchium | 18 | - | - |
| bubblegum | 18 | - | - |
| calcaneum | 15 | - | - |
| caldarium | 14 | - | - |
| capitulum | 15 | a dense cluster of flowers or foliage | - |
| carbonium | 15 | - | - |
| calvarium | 16 | - | - |
| castellum | 13 | - | - |
| castoreum | 13 | - | - |
| cerastium | 13 | mouse-eared chickweed | - |
| claustrum | 13 | a layer of grey matter in the brain adjacent to the lenticular nucleus | - |
| clitellum | 13 | - | - |
| asphaltum | 16 | - | - |
| asplenium | 13 | in some classification systems placed in family Polypodiaceae | - |
| avizandum | 24 | - | - |
| avisandum | 15 | - | - |
| anoestrum | 11 | applies to nonhuman mammals: a state or interval of sexual inactivity between two periods of estrus | - |
| anthurium | 14 | any of various tropical American plants cultivated for their showy foliage and flowers | - |
| anthodium | 15 | - | - |
| arbitrium | 13 | - | - |
| americium | 15 | a radioactive transuranic metallic element; discovered by bombarding uranium with helium atoms | - |
| achaenium | 16 | - | - |
| ligustrum | 12 | genus of Old World shrubs: privet | - |
| moscovium | 18 | - | - |
| joliotium | 18 | - | - |
| hydroxium | 25 | - | - |
| dicalcium | 16 | - | - |
| hedysarum | 18 | genus of herbs of north temperate regions | - |
| ecomuseum | 15 | - | - |
| flerovium | 17 | - | - |
