| blockhouse | (noun) a stronghold that is reinforced for protection from enemy fire; with apertures for defensive fire | - |
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| blocking | (noun) the act of obstructing or deflecting someone's movements | Synonyms: block |
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| bloodstock | (noun) thoroughbred horses (collectively) | - |
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| bluestocking | (noun) a woman having literary or intellectual interests | Synonyms: bas bleu |
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| bobbysock | (noun) a sock that reaches just above the ankle | Synonyms: anklet, anklets, bobbysocks |
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| bobbysocks | (noun) a sock that reaches just above the ankle | Synonyms: anklet, anklets, bobbysock |
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| bocce | (noun) Italian bowling played on a long narrow dirt court | Synonyms: bocci, boccie |
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| bocci | (noun) Italian bowling played on a long narrow dirt court | Synonyms: bocce, boccie |
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| boccie | (noun) Italian bowling played on a long narrow dirt court | Synonyms: bocce, bocci |
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| bocconia | (noun) small Central American tree having loose racemes of purple-tinted green flowers | Synonyms: Bocconia frutescens, tree celandine |
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| (noun) herb of China and Japan widely cultivated for its plumelike panicles of creamy white flowers | Synonyms: Macleaya cordata, plume poppy |
| bock | (noun) a very strong lager traditionally brewed in the fall and aged through the winter for consumption in the spring | Synonyms: bock beer |
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| bollock | (noun) a pulley-block at the head of a topmast | Synonyms: bullock block |
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| (noun) one of the two male reproductive glands that produce spermatozoa and secrete androgens | Synonyms: ball, ballock, egg, nut, orchis, testicle, testis |
| boondocks | (noun) a remote and undeveloped area | Synonyms: back country, backwoods, hinterland |
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| brachistochrone | (noun) a curve between two points along which a body can move under gravity in a shorter time than for any other curve. | - |
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| braggadocio | (noun) vain and empty boasting | Synonyms: bluster, rhodomontade, rodomontade |
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| breechblock | (noun) a metal block in breech-loading firearms that is withdrawn to insert a cartridge and replaced to close the breech before firing | Synonyms: breech closer |
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| brioche | (noun) a light roll rich with eggs and butter and somewhat sweet | - |
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| brocade | (noun) thick heavy expensive material with a raised pattern | - |
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| broccoli | (noun) branched green undeveloped flower heads | - |
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| (noun) plant with dense clusters of tight green flower buds | Synonyms: Brassica oleracea italica |
| brochette | (noun) a small spit or skewer | - |
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| brochure | (noun) a small book usually having a paper cover | Synonyms: booklet, folder, leaflet, pamphlet |
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| brocket | (noun) small South American deer with unbranched antlers | - |
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| (noun) male red deer in its second year | - |
| brooch | (noun) a decorative pin worn by women | Synonyms: breastpin, broach |
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| bullock | (noun) castrated bull | Synonyms: steer |
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| (noun) young bull | - |
| burdock | (noun) any of several erect biennial herbs of temperate Eurasia having stout taproots and producing burs | Synonyms: clotbur |
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| buttock | (noun) either of the two large fleshy masses of muscular tissue that form the human rump | Synonyms: cheek |
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| buttocks | (noun) the fleshy part of the human body that you sit on | Synonyms: arse, ass, backside, behind, bottom, bum, buns, butt, can, derriere, fanny, fundament, hind end, hindquarters, keister, nates, posterior, prat, rear, rear end, rump, seat, stern, tail, tail end, tooshie, tush |
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| cabochon | (noun) a highly polished gem that is cut convexly but without facets | - |
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| carioca | (noun) a lively ballroom dance that resembles the samba | - |
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| (noun) music composed for dancing the carioca | - |
| caroche | (noun) a luxurious carriage suitable for nobility in the 16th and 17th century | - |
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| cassock | (noun) a black garment reaching down to the ankles; worn by priests or choristers | - |
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| celiocentesis | (noun) removal of fluid from the abdomen by centesis | - |
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| cellblock | (noun) a division of a prison (usually consisting of several cells) | Synonyms: ward |
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| cephalochordate | (noun) fish-like animals having a notochord rather than a true spinal column | - |
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| chadlock | (noun) weedy Eurasian plant often a pest in grain fields | Synonyms: Brassica kaber, charlock, field mustard, Sinapis arvensis, wild mustard |
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| chalcocite | (noun) a heavy grey mineral that is an ore of copper | Synonyms: copper glance |
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| charlock | (noun) weedy Eurasian plant often a pest in grain fields | Synonyms: Brassica kaber, chadlock, field mustard, Sinapis arvensis, wild mustard |
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| chiocciole | (noun) a type of pasta that is elbow-shaped. | - |
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| chlorofluorocarbon | (noun) a fluorocarbon with chlorine; formerly used as a refrigerant and as a propellant in aerosol cans | Synonyms: CFC |
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| choanocyte | (noun) any of the flagellated cells in sponges having a collar of cytoplasm around the flagellum; they maintain a flow of water through the body | Synonyms: collar cell |
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| choc | (noun) colloquial British abbreviation | - |
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| chock | (noun) a block of wood used to prevent the sliding or rolling of a heavy object | Synonyms: wedge |
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| chocolate | (noun) a medium brown to dark-brown color | Synonyms: burnt umber, coffee, deep brown, umber |
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| (noun) a food made from roasted ground cacao beans | - |
| (noun) a beverage made from cocoa powder and milk and sugar; usually drunk hot | Synonyms: cocoa, drinking chocolate, hot chocolate |
| circumlocution | (noun) a style that involves indirect ways of expressing things | Synonyms: ambage, periphrasis |
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| (noun) an indirect way of expressing something | Synonyms: indirect expression |
| cirrocumulus | (noun) a cloud at a high altitude consisting of a series of regularly arranged small clouds resembling ripples | Synonyms: cirrocumulus cloud |
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| cleistocarp | (noun) closed spore-bearing structure of some fungi (especially Aspergillaceae and Erysiphaceae) from which spores are released only by decay or disintegration | Synonyms: cleistothecium |
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| clinocephalism | (noun) a congenital defect in which the top of the head is depressed (concave instead of convex) | Synonyms: clinocephaly |
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| clinocephaly | (noun) a congenital defect in which the top of the head is depressed (concave instead of convex) | Synonyms: clinocephalism |
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| clochard | (noun) a wanderer who has no established residence or visible means of support | Synonyms: drifter, floater, vagabond, vagrant |
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| cloche | (noun) a woman's close-fitting hat that resembles a helmet | - |
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| (noun) a low transparent cover put over young plants to protect them from cold | - |
| clock | (noun) a timepiece that shows the time of day | - |
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| clocking | (noun) the time taken to traverse a measured course | - |
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| clockmaker | (noun) someone whose occupation is making or repairing clocks and watches | Synonyms: clocksmith |
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| clocks | (noun) European weed naturalized in southwestern United States and Mexico having reddish decumbent stems with small fernlike leaves and small deep reddish-lavender flowers followed by slender fruits that stick straight up; often grown for forage | Synonyms: alfilaria, alfileria, Erodium cicutarium, filaree, filaria, pin clover, pin grass, redstem storksbill |
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| clocksmith | (noun) someone whose occupation is making or repairing clocks and watches | Synonyms: clockmaker |
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| clockwork | (noun) any mechanism of geared wheels that is driven by a coiled spring; resembles the works of a mechanical clock | - |
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| coca | (noun) dried leaves of the coca plant (and related plants that also contain cocaine); chewed by Andean people for their stimulating effect | - |
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| (noun) a South American shrub whose leaves are chewed by natives of the Andes; a source of cocaine | Synonyms: coca plant, Erythroxylon coca |
| cocain | (noun) a narcotic (alkaloid) extracted from coca leaves; used as a surface anesthetic or taken for pleasure; can become powerfully addictive | Synonyms: cocaine |
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| cocaine | (noun) a narcotic (alkaloid) extracted from coca leaves; used as a surface anesthetic or taken for pleasure; can become powerfully addictive | Synonyms: cocain |
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| cocarboxylase | (noun) a coenzyme important in respiration in the Krebs cycle | Synonyms: thiamine pyrophosphate |
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| cocci | (noun) any spherical or nearly spherical bacteria | Synonyms: coccus |
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| coccidioidomycosis | (noun) an infection of the lungs and skin characterized by excessive sputum and nodules | Synonyms: coccidiomycosis, desert rheumatism, valley fever |
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| coccidiomycosis | (noun) an infection of the lungs and skin characterized by excessive sputum and nodules | Synonyms: coccidioidomycosis, desert rheumatism, valley fever |
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| coccidiosis | (noun) (veterinary medicine) infestation with coccidia | - |
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| coccidium | (noun) parasitic on the digestive epithelium of vertebrates and higher invertebrates | Synonyms: eimeria |
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| coccobacillus | (noun) a bacterial cell intermediate in morphology between a coccus and a bacillus; a very short bacillus | - |
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| coccus | (noun) any spherical or nearly spherical bacteria | Synonyms: cocci |
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| coccyx | (noun) the end of the vertebral column in humans and tailless apes | Synonyms: tail bone |
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| cochin | (noun) Asian breed of large fowl with dense plumage and feathered legs | Synonyms: cochin china |
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| cochineal | (noun) Mexican red scale insect that feeds on cacti; the source of a red dye | Synonyms: cochineal insect, Dactylopius coccus |
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| (noun) a red dyestuff consisting of dried bodies of female cochineal insects | - |
| cochlea | (noun) the snail-shaped tube (in the inner ear coiled around the modiolus) where sound vibrations are converted into nerve impulses by the organ of Corti | - |
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| cock | (noun) adult male bird | - |
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| (noun) adult male chicken | Synonyms: rooster |
| (noun) faucet consisting of a rotating device for regulating flow of a liquid | Synonyms: stopcock, turncock |
| (noun) the part of a gunlock that strikes the percussion cap when the trigger is pulled | Synonyms: hammer |
| (noun) obscene terms for penis | Synonyms: dick, pecker, prick, putz, shaft, tool |
| cockade | (noun) an ornament (such as a knot of ribbon or a rosette) usually worn on the hat | - |
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| cockateel | (noun) small grey Australian parrot with a yellow crested head | Synonyms: cockatiel, cockatoo parrot, Nymphicus hollandicus |
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| cockatiel | (noun) small grey Australian parrot with a yellow crested head | Synonyms: cockateel, cockatoo parrot, Nymphicus hollandicus |
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| cockatoo | (noun) white or light-colored crested parrot of the Australian region; often kept as cage birds | - |
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| cockatrice | (noun) monster hatched by a reptile from a cock's egg; able to kill with a glance | - |
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| cockchafer | (noun) any of various large European beetles destructive to vegetation as both larvae and adult | Synonyms: May beetle, May bug, Melolontha melolontha |
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| cockcrow | (noun) the first light of day | Synonyms: aurora, break of day, break of the day, dawn, dawning, daybreak, dayspring, first light, morning, sunrise, sunup |
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| cocker | (noun) a small breed with wavy silky hair; originally developed in England | Synonyms: cocker spaniel, English cocker spaniel |
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| cockerel | (noun) a young domestic cock; not older than one year | - |
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| cockfight | (noun) a match in a cockpit between two fighting cocks heeled with metal gaffs | - |
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| cockfighting | (noun) participation in the sport of matching gamecocks in a cockfight | - |
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| cockhorse | (noun) anything used as a toy horse (such as a rocking horse or one knee of an adult) | - |
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| cockiness | (noun) offensive boldness and assertiveness | Synonyms: bumptiousness, forwardness, pushiness |
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| cockle | (noun) common edible, burrowing European bivalve mollusk that has a strong, rounded shell with radiating ribs | - |
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| (noun) common edible European bivalve | - |
| cocklebur | (noun) any coarse weed of the genus Xanthium having spiny burrs | Synonyms: cockle-bur, cockle-burr, cockleburr |
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| (noun) burdock having heart-shaped leaves found in open woodland, hedgerows and rough grassland of Europe (except extreme N) and Asia Minor; sometimes cultivated for medicinal and culinary use | Synonyms: Arctium lappa, great burdock, greater burdock |
| cockleburr | (noun) any coarse weed of the genus Xanthium having spiny burrs | Synonyms: cockle-bur, cockle-burr, cocklebur |
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| cockleshell | (noun) a small light flimsy boat | - |
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| cockloft | (noun) a small loft or garret | - |
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| cockney | (noun) the nonstandard dialect of natives of the east end of London | - |
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| cockpit | (noun) compartment where the pilot sits while flying the aircraft | - |
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| (noun) seat where the driver sits while driving a racing car | - |
| (noun) a pit for cockfights | - |
| cockroach | (noun) any of numerous chiefly nocturnal insects; some are domestic pests | Synonyms: roach |
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| cockscomb | (noun) the fleshy red crest on the head of the domestic fowl and other gallinaceous birds | Synonyms: comb, coxcomb |
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| (noun) a cap worn by court jesters; adorned with a strip of red | Synonyms: coxcomb |
| (noun) a conceited dandy who is overly impressed by his own accomplishments | Synonyms: coxcomb |
| (noun) garden annual with featherlike spikes of red or yellow flowers | Synonyms: Celosia argentea cristata, Celosia cristata, common cockscomb |
| cocksfoot | (noun) widely grown stout Old World hay and pasture grass | Synonyms: cockspur, Dactylis glomerata, orchard grass |
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| cockspur | (noun) small spiny West Indian tree | Synonyms: Pisonia aculeata |
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| (noun) widely grown stout Old World hay and pasture grass | Synonyms: cocksfoot, Dactylis glomerata, orchard grass |
| cocksucker | (noun) insulting terms of address for people who are stupid or irritating or ridiculous | Synonyms: asshole, bastard, dickhead, mother fucker, motherfucker, prick, shit, SOB, son of a bitch, whoreson |
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| (noun) a person who performs fellatio | - |
| cocksureness | (noun) total certainty or greater certainty than circumstances warrant | Synonyms: certitude, overconfidence |
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| cocktail | (noun) a short mixed drink | - |
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| (noun) an appetizer served as a first course at a meal | - |
| cockup | (noun) something badly botched or muddled | Synonyms: balls-up, ballup, mess-up |
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