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544 Words That End With UM

Part of Speech:
Word Definitions Synonyms
abomasum (noun) the fourth compartment of the stomach of a ruminant; the one where digestion takes place Synonyms: 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 Synonyms: cotyloid cavity
acetum (noun) sour-tasting liquid produced usually by oxidation of the alcohol in wine or cider and used as a condiment or food preservative Synonyms: vinegar
(noun) a dilute solution of acetic acid that is used as a solvent (e.g. for a drug)
actinium (noun) a radioactive element of the actinide series; found in uranium ores Synonyms: Ac, atomic number 89
addendum (noun) textual matter that is added onto a publication; usually at the end Synonyms: postscript, supplement
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) Synonyms: agenda, order of business
ageratum (noun) any plant of the genus Ageratum having opposite leaves and small heads of blue or white flowers
(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 Synonyms: Conoclinium coelestinum, Eupatorium coelestinum, mist-flower, mistflower
alarum (noun) an automatic signal (usually a sound) warning of danger Synonyms: alarm, alert, warning signal
album (noun) a book of blank pages with pockets or envelopes; for organizing photographs or stamp collections etc
(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 Synonyms: record album
alluvium (noun) clay or silt or gravel carried by rushing streams and deposited where the stream slows down Synonyms: alluvial deposit, alluvial sediment, alluvion
alum (noun) a double sulphate of aluminum and potassium that is used as an astringent (among other things)
(noun) a white crystalline double sulfate of aluminum: the potassium double sulfate of aluminum Synonyms: potash alum, potassium alum
(noun) a white crystalline double sulfate of aluminum: the ammonium double sulfate of aluminum Synonyms: ammonia alum, ammonium alum
(noun) a person who has received a degree from a school (high school or college or university) Synonyms: grad, graduate
aluminium (noun) a silvery ductile metallic element found primarily in bauxite Synonyms: Al, aluminum, atomic number 13
aluminum (noun) a silvery ductile metallic element found primarily in bauxite Synonyms: 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 Synonyms: 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 Synonyms: 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 Synonyms: 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 Synonyms: starch
androecium (noun) a male gametoecium
anestrum (noun) applies to nonhuman mammals: a state or interval of sexual inactivity between two periods of estrus Synonyms: 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 Synonyms: animalcule
annum (noun) (Latin) year
anoestrum (noun) applies to nonhuman mammals: a state or interval of sexual inactivity between two periods of estrus Synonyms: anestrum, anestrus, anoestrus
antebellum (adjective) belonging to a period before a war especially the American Civil War
antepartum (adjective) occurring or existing before birth Synonyms: antenatal, prenatal
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 Synonyms: 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 Synonyms: fish tank, marine museum
arboretum (noun) a facility where trees and shrubs are cultivated for exhibition Synonyms: botanical garden
arcanum (noun) information known only to a special group Synonyms: secret
archaebacterium (noun) considered ancient life forms that evolved separately from bacteria and blue-green algae Synonyms: 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 Synonyms: archespore
archipallium (noun) the olfactory cortex of the cerebrum Synonyms: paleocortex
armamentarium (noun) the collection of equipment and methods used in the practice of medicine
arum (noun) any plant of the family Araceae; have small flowers massed on a spadix surrounded by a large spathe Synonyms: aroid
(noun) starch resembling sago that is obtained from cuckoopint root
aspersorium (noun) the basin or other vessel that holds holy water in Roman Catholic Churches
(noun) a short-handled device with a globe containing a sponge; used for sprinkling holy water Synonyms: aspergill
asylum (noun) a hospital for mentally incompetent or unbalanced person Synonyms: insane asylum, institution, mental home, mental hospital, mental institution, psychiatric hospital
(noun) a shelter from danger or hardship Synonyms: refuge, sanctuary
athenaeum (noun) a place where reading materials are available Synonyms: atheneum
(noun) a literary or scientific association for the promotion of learning Synonyms: atheneum
atheneum (noun) a place where reading materials are available Synonyms: athenaeum
(noun) a literary or scientific association for the promotion of learning Synonyms: athenaeum
atrium (noun) the central area in a building; open to the sky
(noun) any chamber that is connected to other chambers or passageways (especially one of the two upper chambers of the heart)
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 Synonyms: bacteria
barium (noun) a soft silvery metallic element of the alkali earth group; found in barite Synonyms: 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 Synonyms: atomic number 97, Bk
beryllium (noun) a light strong brittle grey toxic bivalent metallic element Synonyms: atomic number 4, Be, glucinium
bimillennium (noun) a span of 2000 years Synonyms: bimillenary
(noun) the 2000th anniversary (or the celebration of it) Synonyms: bimillenary
bohrium (noun) a transuranic element with atomic number 107 Synonyms: atomic number 107, Bh, element 107
botulinum (noun) anaerobic bacterium producing botulin the toxin that causes botulism Synonyms: botulinus, Clostridium botulinum
brachium (noun) (biology) a branching or armlike part of an animal
bum (adjective) of very poor quality; flimsy Synonyms: cheap, cheesy, chintzy, crummy, punk, sleazy, tinny
(noun) the fleshy part of the human body that you sit on Synonyms: arse, ass, backside, behind, bottom, buns, butt, buttocks, can, derriere, fanny, fundament, hind end, hindquarters, keister, nates, posterior, prat, rear, rear end, rump, seat, stern, tail, tail end, tooshie, tush
(noun) a vagrant Synonyms: hobo, tramp
(noun) a person who is deemed to be despicable or contemptible Synonyms: crumb, dirty dog, git, lowlife, puke, rat, rotter, scum bag, scumbag, skunk, so-and-so, stinker, stinkpot
(noun) person who does no work Synonyms: do-nothing, idler, layabout, loafer
(verb) ask for and get free; be a parasite Synonyms: cadge, grub, mooch, sponge
(verb) be lazy or idle Synonyms: arse about, arse around, bum about, bum around, frig around, fuck off, loaf, loll, loll around, lounge about, lounge around, waste one's time
bunkum (noun) unacceptable behavior (especially ludicrously false statements) Synonyms: buncombe, bunk, guff, hogwash, rot
cadmium (noun) a soft bluish-white ductile malleable toxic bivalent metallic element; occurs in association with zinc ores Synonyms: atomic number 48, Cd
caecum (noun) the cavity in which the large intestine begins and into which the ileum opens Synonyms: blind gut, cecum
caesium (noun) a soft silver-white ductile metallic element (liquid at normal temperatures); the most electropositive and alkaline metal Synonyms: atomic number 55, cesium, Cs
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 Synonyms: atomic number 20, Ca
californium (noun) a radioactive transuranic element; discovered by bombarding curium with alpha particles Synonyms: atomic number 98, Cf
cambium (noun) the inner layer of the periosteum
(noun) a formative one-cell layer of tissue between xylem and phloem in most vascular plants that is responsible for secondary growth
candelabrum (noun) branched candlestick; ornamental; has several lights Synonyms: candelabra
capitulum (noun) a dense cluster of flowers or foliage Synonyms: head
(noun) fruiting spike of a cereal plant especially corn Synonyms: ear, spike
(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 Synonyms: capsicum pepper plant, pepper
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 Synonyms: cardamom, cardamon
cavum (noun) (anatomy) a natural hollow or sinus within the body Synonyms: bodily cavity, cavity
cecum (noun) the cavity in which the large intestine begins and into which the ileum opens Synonyms: blind gut, caecum
cementum (noun) a specialized bony substance covering the root of a tooth Synonyms: 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 Synonyms: atomic number 58, Ce
cesium (noun) a soft silver-white ductile metallic element (liquid at normal temperatures); the most electropositive and alkaline metal Synonyms: atomic number 55, caesium, Cs
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 Synonyms: atomic number 24, Cr
chrysanthemum (noun) any of numerous perennial Old World herbs having showy brightly colored flower heads of the genera Chrysanthemum, Argyranthemum, Dendranthema, Tanacetum; widely cultivated
(noun) the flower of a chrysanthemum plant
chum (noun) a large Pacific salmon with small spots on its back; an important food fish Synonyms: chum salmon, Oncorhynchus keta
(noun) bait consisting of chopped fish and fish oils that are dumped overboard to attract fish
(noun) a close friend who accompanies his buddies in their activities Synonyms: brother, buddy, crony, pal, sidekick
cilium (noun) a hairlike projection from the surface of a cell; provides locomotion in free-swimming unicellular organisms
(noun) any of the short curved hairs that grow from the edges of the eyelids Synonyms: eyelash, lash
cinerarium (noun) a niche for a funeral urn containing the ashes of the cremated dead Synonyms: 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 Synonyms: cleistocarp
clostridium (noun) spindle-shaped bacterial cell especially one swollen at the center by an endospore Synonyms: clostridia
coagulum (noun) a lump of material formed from the content of a liquid Synonyms: clot
coccidium (noun) parasitic on the digestive epithelium of vertebrates and higher invertebrates Synonyms: eimeria
coliseum (noun) an oval large stadium with tiers of seats; an arena in which contests and spectacles are held Synonyms: amphitheater, amphitheatre
colloquium (noun) an address to an academic meeting or seminar
(noun) an academic meeting or seminar usually led by a different lecturer and on a different topic at each meeting
collyrium (noun) lotion consisting of a solution used as a cleanser for the eyes Synonyms: eye-lotion, eyewash
colostrum (noun) milky fluid secreted for the first day or two after parturition Synonyms: foremilk
columbarium (noun) a sepulchral vault or other structure having recesses in the walls to receive cinerary urns
(noun) a niche for a funeral urn containing the ashes of the cremated dead Synonyms: cinerarium
(noun) a birdhouse for pigeons Synonyms: columbary, dovecote

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