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544 Words That End With UM

Word Definitions Synonyms
abomasum (noun) the fourth compartment of the stomach of a ruminant; the one where digestion takes place fourth stomach
acetabulum (noun) the cup-shaped hollow in the hipbone into which the head of the femur fits to form a ball-and-socket joint cotyloid cavity
acetum (noun) a dilute solution of acetic acid that is used as a solvent (e.g. for a drug) -
acetum (noun) sour-tasting liquid produced usually by oxidation of the alcohol in wine or cider and used as a condiment or food preservative vinegar
actinium (noun) a radioactive element of the actinide series; found in uranium ores Ac, atomic number 89
addendum (noun) textual matter that is added onto a publication; usually at the end supplement, postscript
aecium (noun) fruiting body of some rust fungi bearing chains of aeciospores -
agendum (noun) a list of matters to be taken up (as at a meeting) agenda, order of business
ageratum (noun) rhizomatous plant of central and southeastern United States and West Indies having large showy heads of clear blue flowers; sometimes placed in genus Eupatorium mist-flower, mistflower, Eupatorium coelestinum, Conoclinium coelestinum
ageratum (noun) any plant of the genus Ageratum having opposite leaves and small heads of blue or white flowers -
alarum (noun) an automatic signal (usually a sound) warning of danger alarm, warning signal, alert
album (noun) one or more recordings issued together; originally released on 12-inch phonograph records (usually with attractive record covers) and later on cassette audiotape and compact disc record album
album (noun) a book of blank pages with pockets or envelopes; for organizing photographs or stamp collections etc -
alluvium (noun) clay or silt or gravel carried by rushing streams and deposited where the stream slows down alluvion, alluvial deposit, alluvial sediment
alum (noun) a white crystalline double sulfate of aluminum: the ammonium double sulfate of aluminum ammonia alum, ammonium alum
alum (noun) a white crystalline double sulfate of aluminum: the potassium double sulfate of aluminum potash alum, potassium alum
alum (noun) a double sulphate of aluminum and potassium that is used as an astringent (among other things) -
alum (noun) a person who has received a degree from a school (high school or college or university) graduate, grad, alumna, alumnus
aluminium (noun) a silvery ductile metallic element found primarily in bauxite Al, aluminum, atomic number 13
aluminum (noun) a silvery ductile metallic element found primarily in bauxite Al, aluminium, atomic number 13
alundum (noun) a substance made of fused alumina -
alyssum (noun) any garden plant of the genus Alyssum having clusters of small yellow or white flowers madwort
ambulacrum (noun) one of the five areas on the undersurface of an echinoderm on which the tube feet are located -
americium (noun) a radioactive transuranic metallic element; discovered by bombarding uranium with helium atoms Am, atomic number 95
ammobium (noun) any plant of the genus Ammobium having yellow flowers and silvery foliage -
ammonium (noun) the ion NH4 derived from ammonia; behaves in many respects like an alkali metal ion ammonium ion
amylum (noun) a complex carbohydrate found chiefly in seeds, fruits, tubers, roots and stem pith of plants, notably in corn, potatoes, wheat, and rice; an important foodstuff and used otherwise especially in adhesives and as fillers and stiffeners for paper and textiles starch
androecium (noun) a male gametoecium -
anestrum (noun) applies to nonhuman mammals: a state or interval of sexual inactivity between two periods of estrus anestrus, anoestrum, anoestrus
angrecum (noun) any of various spectacular orchids of the genus Angraecum having dark green leathery leaves and usually nocturnally scented white or ivory flowers -
animalculum (noun) microscopic organism such as an amoeba or paramecium animalcule
annum (noun) (Latin) year -
anoestrum (noun) applies to nonhuman mammals: a state or interval of sexual inactivity between two periods of estrus anestrum, anestrus, anoestrus
antebellum (adjective) belonging to a period before a war especially the American Civil War -
antepartum (adjective) occurring or existing before birth prenatal, antenatal
antheridium (noun) the male sex organ of spore-producing plants; produces antherozoids; equivalent to the anther in flowers -
anthurium (noun) any of various tropical American plants cultivated for their showy foliage and flowers tail-flower, tailflower
antiserum (noun) blood serum containing antibodies against specific antigens; provides immunity to a disease -
antrum (noun) a natural cavity or hollow in a bone -
apothecium (noun) a cuplike ascocarp in many lichens and ascomycetous fungi -
aquarium (noun) a tank or pool or bowl filled with water for keeping live fish and underwater animals marine museum, fish tank
arboretum (noun) a facility where trees and shrubs are cultivated for exhibition botanical garden
arcanum (noun) information known only to a special group secret
archaebacterium (noun) considered ancient life forms that evolved separately from bacteria and blue-green algae archaebacteria, archaeobacteria, archeobacteria
archegonium (noun) a female sex organ occurring in mosses, ferns, and most gymnosperms -
archesporium (noun) primitive cell or group of cells from which a mother cell develops archespore
archipallium (noun) the olfactory cortex of the cerebrum paleocortex
armamentarium (noun) the collection of equipment and methods used in the practice of medicine -
arum (noun) starch resembling sago that is obtained from cuckoopint root -
arum (noun) any plant of the family Araceae; have small flowers massed on a spadix surrounded by a large spathe aroid
aspersorium (noun) the basin or other vessel that holds holy water in Roman Catholic Churches -
aspersorium (noun) a short-handled device with a globe containing a sponge; used for sprinkling holy water aspergill
asylum (noun) a shelter from danger or hardship refuge, sanctuary
asylum (noun) a hospital for mentally incompetent or unbalanced person institution, insane asylum, mental home, mental hospital, mental institution, psychiatric hospital
athenaeum (noun) a literary or scientific association for the promotion of learning atheneum
athenaeum (noun) a place where reading materials are available atheneum
atheneum (noun) a literary or scientific association for the promotion of learning athenaeum
atheneum (noun) a place where reading materials are available athenaeum
atrium (noun) any chamber that is connected to other chambers or passageways (especially one of the two upper chambers of the heart) -
atrium (noun) the central area in a building; open to the sky -
auditorium (noun) the area of a theater or concert hall where the audience sits -
bacterium (noun) (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 bacteria
barium (noun) a soft silvery metallic element of the alkali earth group; found in barite atomic number 56, Ba
basidium (noun) a small club-shaped structure typically bearing four basidiospores at the ends of minute projections; unique to basidiomycetes -
bdellium (noun) aromatic gum resin; similar to myrrh -
begum (noun) a Muslim woman of high rank in India or Pakistan -
berkelium (noun) a radioactive transuranic element; discovered by bombarding americium with helium atomic number 97, Bk
beryllium (noun) a light strong brittle grey toxic bivalent metallic element glucinium, atomic number 4, Be
bimillennium (noun) the 2000th anniversary (or the celebration of it) bimillenary
bimillennium (noun) a span of 2000 years bimillenary
bohrium (noun) a transuranic element with atomic number 107 element 107, atomic number 107, Bh
botulinum (noun) anaerobic bacterium producing botulin the toxin that causes botulism Clostridium botulinum, botulinus
brachium (noun) (biology) a branching or armlike part of an animal -
bum (verb) ask for and get free; be a parasite mooch, grub, sponge, cadge
bum (verb) be lazy or idle fuck off, waste one's time, arse about, arse around, bum about, bum around, frig around, loaf, loll, loll around, lounge about, lounge around
bum (noun) a person who is deemed to be despicable or contemptible puke, rat, skunk, stinker, crumb, stinkpot, rotter, dirty dog, git, scum bag, scumbag, so-and-so, lowlife
bum (noun) a vagrant tramp, hobo
bum (noun) person who does no work idler, do-nothing, layabout, loafer
bum (noun) the fleshy part of the human body that you sit on rear, seat, backside, bottom, ass, fundament, stern, can, butt, tail, rear end, rump, nates, hind end, hindquarters, derriere, posterior, prat, keister, arse, behind, buns, buttocks, fanny, tail end, tooshie, tush
bum (adjective) of very poor quality; flimsy punk, sleazy, cheap, cheesy, chintzy, crummy, tinny
bunkum (noun) unacceptable behavior (especially ludicrously false statements) bunk, rot, hogwash, guff, buncombe
cadmium (noun) a soft bluish-white ductile malleable toxic bivalent metallic element; occurs in association with zinc ores Cd, atomic number 48
caecum (noun) the cavity in which the large intestine begins and into which the ileum opens cecum, blind gut
caesium (noun) a soft silver-white ductile metallic element (liquid at normal temperatures); the most electropositive and alkaline metal Cs, cesium, atomic number 55
caladium (noun) any plant of the genus Caladium cultivated for their ornamental foliage variously patterned in white or pink or red -
calcium (noun) a white metallic element that burns with a brilliant light; the fifth most abundant element in the earth's crust; an important component of most plants and animals Ca, atomic number 20
californium (noun) a radioactive transuranic element; discovered by bombarding curium with alpha particles Cf, atomic number 98
cambium (noun) a formative one-cell layer of tissue between xylem and phloem in most vascular plants that is responsible for secondary growth -
cambium (noun) the inner layer of the periosteum -
candelabrum (noun) branched candlestick; ornamental; has several lights candelabra
capitulum (noun) a dense cluster of flowers or foliage head
capitulum (noun) fruiting spike of a cereal plant especially corn ear, spike
capitulum (noun) an arrangement of leafy branches forming the top or head of a tree -
capsicum (noun) any of various tropical plants of the genus Capsicum bearing peppers pepper, capsicum pepper plant
carborundum (noun) an abrasive composed of silicon carbide crystals -
cardamum (noun) aromatic seeds used as seasoning like cinnamon and cloves especially in pickles and barbecue sauces cardamom, cardamon
cavum (noun) (anatomy) a natural hollow or sinus within the body cavity, bodily cavity
cecum (noun) the cavity in which the large intestine begins and into which the ileum opens caecum, blind gut
cementum (noun) a specialized bony substance covering the root of a tooth cement
centrum (noun) the main body of a vertebra -
cerebellum (noun) a major division of the vertebrate brain; situated above the medulla oblongata and beneath the cerebrum in humans -
cerebrum (noun) anterior portion of the brain consisting of two hemispheres; dominant part of the brain in humans -
cerium (noun) a ductile grey metallic element of the lanthanide series; used in lighter flints; the most abundant of the rare-earth group Ce, atomic number 58
cesium (noun) a soft silver-white ductile metallic element (liquid at normal temperatures); the most electropositive and alkaline metal Cs, caesium, atomic number 55
checksum (noun) a digit representing the sum of the digits in an instance of digital data; used to check whether errors have occurred in transmission or storage -
chetrum (noun) 100 chetrums equal 1 ngultrum in Bhutan -
chromium (noun) a hard brittle multivalent metallic element; resistant to corrosion and tarnishing Cr, atomic number 24
chrysanthemum (noun) the flower of a chrysanthemum plant -
chrysanthemum (noun) any of numerous perennial Old World herbs having showy brightly colored flower heads of the genera Chrysanthemum, Argyranthemum, Dendranthema, Tanacetum; widely cultivated -
chum (noun) a close friend who accompanies his buddies in their activities pal, sidekick, crony, brother, buddy
chum (noun) bait consisting of chopped fish and fish oils that are dumped overboard to attract fish -
chum (noun) a large Pacific salmon with small spots on its back; an important food fish Oncorhynchus keta, chum salmon
cilium (noun) a hairlike projection from the surface of a cell; provides locomotion in free-swimming unicellular organisms -
cilium (noun) any of the short curved hairs that grow from the edges of the eyelids lash, eyelash
cinerarium (noun) a niche for a funeral urn containing the ashes of the cremated dead columbarium
cingulum (noun) (anatomy) an encircling structure (as the ridge around the base of a tooth) -
claustrum (noun) a layer of grey matter in the brain adjacent to the lenticular nucleus -
cleistothecium (noun) closed spore-bearing structure of some fungi (especially Aspergillaceae and Erysiphaceae) from which spores are released only by decay or disintegration cleistocarp
clostridium (noun) spindle-shaped bacterial cell especially one swollen at the center by an endospore clostridia
coagulum (noun) a lump of material formed from the content of a liquid clot
coccidium (noun) parasitic on the digestive epithelium of vertebrates and higher invertebrates eimeria
coliseum (noun) an oval large stadium with tiers of seats; an arena in which contests and spectacles are held amphitheater, amphitheatre
colloquium (noun) an academic meeting or seminar usually led by a different lecturer and on a different topic at each meeting -
colloquium (noun) an address to an academic meeting or seminar -
collyrium (noun) lotion consisting of a solution used as a cleanser for the eyes eye-lotion, eyewash
colostrum (noun) milky fluid secreted for the first day or two after parturition foremilk
columbarium (noun) a birdhouse for pigeons dovecote, columbary
columbarium (noun) a niche for a funeral urn containing the ashes of the cremated dead cinerarium
columbarium (noun) a sepulchral vault or other structure having recesses in the walls to receive cinerary urns -

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