| bronchoscopic | (adjective) of or relating to an instrument for examining the interior of the bronchi | - |
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| bronchospasm | (noun) a spasm of the bronchi that makes exhalation difficult and noisy; associated with asthma and bronchitis | - |
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| brotherhood | (noun) the feeling that men should treat one another like brothers | - |
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| (noun) people engaged in a particular occupation | Synonyms: fraternity, sodality |
| (noun) an organization of employees formed to bargain with the employer | Synonyms: labor union, trade union, trades union, union |
| (noun) the kinship relation between a male offspring and the siblings | - |
| buckshot | (noun) small lead shot for shotgun shells | Synonyms: bird shot, duck shot |
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| buckthorn | (noun) any shrub or small tree of the genus Bumelia | - |
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| (noun) a shrub or shrubby tree of the genus Rhamnus; fruits are source of yellow dyes or pigments | - |
| (noun) an Old World plantain with long narrow ribbed leaves widely established in temperate regions | Synonyms: English plantain, narrow-leaved plantain, Plantago lanceolata, ribgrass, ribwort, ripple-grass |
| bullhorn | (noun) a portable loudspeaker with built-in microphone and amplifier | Synonyms: loud-hailer, loud hailer |
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| bullshot | (noun) a cocktail made with vodka and beef bouillon or consomme | - |
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| bunghole | (noun) a hole in a barrel or cask; used to fill or empty it | - |
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| (noun) vulgar slang for anus | Synonyms: arse, arsehole, asshole |
| buttonhole | (noun) a hole through which buttons are pushed | Synonyms: button hole |
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| (verb) detain in conversation by or as if by holding on to the outer garments of; as for political or economic favors | Synonyms: lobby |
| buttonhook | (noun) a hook for pulling a button through a buttonhole | - |
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| cabochon | (noun) a highly polished gem that is cut convexly but without facets | - |
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| cachou | (noun) a scented lozenge used to sweeten the breath (e.g. to conceal the odor of tobacco) | - |
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| cacophonic | (adjective) having an unpleasant sound | Synonyms: cacophonous |
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| cacophonous | (adjective) having an unpleasant sound | Synonyms: cacophonic |
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| cacophony | (noun) loud confusing disagreeable sounds | - |
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| (noun) a loud harsh or strident noise | Synonyms: blare, blaring, clamor, din |
| cahoot | (noun) collusion | - |
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| cakehole | (noun) informal terms for the mouth | Synonyms: gob, hole, maw, trap, yap |
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| camphor | (noun) a resin obtained from the camphor tree; used in making celluloid and liniment | - |
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| camphoraceous | (adjective) being or having the properties of camphor | - |
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| camphorate | (verb) treat with camphor | - |
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| camphorated | (adjective) impregnated with camphor | - |
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| camphoric | (adjective) relating to or derived from or containing camphor | - |
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| camphorweed | (noun) aromatic plant of western United States | Synonyms: Trichostema lanceolatum, turpentine camphor weed, vinegarweed |
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| caoutchouc | (noun) an elastic material obtained from the latex sap of trees (especially trees of the genera Hevea and Ficus) that can be vulcanized and finished into a variety of products | Synonyms: gum elastic, India rubber, natural rubber, rubber |
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| cardholder | (noun) a player who holds a card or cards in a card game | - |
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| (noun) a person who holds a credit card or debit card | - |
| cardhouse | (noun) an unstable construction with playing cards | Synonyms: card-house, cardcastle, house of cards |
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| carhop | (noun) a waiter at a drive-in restaurant | - |
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| carpophore | (noun) a slender stalk that furnishes an axis for a carpel | - |
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| carthorse | (noun) draft horse kept for pulling carts | Synonyms: cart horse, drayhorse |
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| cataphoresis | (noun) the motion of charged particles in a colloid under the influence of an electric field; particles with a positive charge go to the cathode and negative to the anode | Synonyms: dielectrolysis, electrophoresis, ionophoresis |
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| cataphoretic | (adjective) of or relating to electrophoresis | Synonyms: electrophoretic |
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| catecholamine | (noun) any of a group of chemicals including epinephrine and norepinephrine that are produced in the medulla of the adrenal gland | - |
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| cathode | (noun) a negatively charged electrode that is the source of electrons entering an electrical device | - |
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| (noun) the positively charged terminal of a voltaic cell or storage battery that supplies current | - |
| cathodic | (adjective) of or at or pertaining to a cathode | - |
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| catholic | (adjective) free from provincial prejudices or attachments | - |
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| catholicise | (verb) cause to adopt Catholicism | Synonyms: catholicize, latinise, latinize |
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| catholicity | (noun) the quality of being universal; existing everywhere | Synonyms: universality |
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| catholicize | (verb) cause to adopt Catholicism | Synonyms: catholicise, latinise, latinize |
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| catholicon | (noun) hypothetical remedy for all ills or diseases; once sought by the alchemists | Synonyms: cure-all, nostrum, panacea |
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| cathouse | (noun) a building where prostitutes are available | Synonyms: bagnio, bawdyhouse, bordello, brothel, house of ill repute, house of prostitution, sporting house, whorehouse |
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| cellphone | (noun) a hand-held mobile radiotelephone for use in an area divided into small sections, each with its own short-range transmitter/receiver | Synonyms: cell, cellular phone, cellular telephone, mobile phone |
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| cephalochordate | (noun) fish-like animals having a notochord rather than a true spinal column | - |
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| chaetognathous | (adjective) of or relating to arrowworms | Synonyms: chaetognathan |
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| chapterhouse | (noun) a house used as a residence by a chapter of a fraternity | Synonyms: frat house, fraternity house |
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| (noun) a building attached to a monastery or cathedral; used as a meeting place for the chapter | - |
| charterhouse | (noun) a Carthusian monastery | - |
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| childhood | (noun) the state of a child between infancy and adolescence | Synonyms: puerility |
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| (noun) the time of person's life when they are a child | - |
| chinchona | (noun) any of several trees of the genus Cinchona | Synonyms: cinchona |
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| chlamyphore | (noun) very small Argentine armadillo with pale silky hair and pink plates on head and neck | Synonyms: Chlamyphorus truncatus, fairy armadillo, pichiciago, pichiciego |
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| choana | (noun) either one of the two posterior openings at the back of the nasal cavity leading to the nasopharynx | Synonyms: internal nostril, posterior nasal aperture |
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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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| (adverb) as completely as possible | Synonyms: chock-a-block |
| (verb) support on chocks | - |
| (verb) secure with chocks | - |
| chockablock | (adjective) packed full to capacity | Synonyms: chock-full, chockful, choke-full, chuck-full, cram full |
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| chockful | (adjective) packed full to capacity | Synonyms: chock-full, chockablock, choke-full, chuck-full, cram full |
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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 |
| choice | (adjective) of superior grade | Synonyms: prime, prize, quality, select |
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| (adjective) appealing to refined taste | - |
| (noun) the act of choosing or selecting | Synonyms: option, pick, selection |
| (noun) the person or thing chosen or selected | Synonyms: pick, selection |
| (noun) one of a number of things from which only one can be chosen | Synonyms: alternative, option |
| choiceness | (noun) the quality of being very good indeed | Synonyms: fineness |
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| choir | (noun) the area occupied by singers; the part of the chancel between sanctuary and nave | - |
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| (noun) a chorus that sings as part of a religious ceremony | - |
| (noun) a family of similar musical instrument playing together | Synonyms: consort |
| (verb) sing in a choir | Synonyms: chorus |
| choirboy | (noun) a boy who sings in a choir | - |
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| choirmaster | (noun) the musical director of a choir | Synonyms: cantor, precentor |
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| choke | (noun) a valve that controls the flow of air into the carburetor of a gasoline engine | - |
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| (noun) a coil of low resistance and high inductance used in electrical circuits to pass direct current and attenuate alternating current | Synonyms: choke coil, choking coil |
| (verb) breathe with great difficulty, as when experiencing a strong emotion | - |
| (verb) cause to retch or choke | Synonyms: gag |
| (verb) struggle for breath; have insufficient oxygen intake | Synonyms: gag, strangle, suffocate |
| (verb) constrict (someone's) throat and keep from breathing | Synonyms: strangle |
| (verb) reduce the air supply | Synonyms: throttle |
| (verb) pass from physical life and lose all bodily attributes and functions necessary to sustain life | Synonyms: buy the farm, cash in one's chips, conk, croak, decease, die, drop dead, exit, expire, give-up the ghost, go, kick the bucket, pass, pass away, perish, pop off, snuff it |
| (verb) suppress the development, creativity, or imagination of | Synonyms: suffocate |
| (verb) become stultified, suppressed, or stifled | Synonyms: suffocate |
| (verb) be too tight; rub or press | Synonyms: fret, gag |
| (verb) become or cause to become obstructed | Synonyms: back up, choke off, clog, clog up, congest, crap up, foul |
| (verb) wring the neck of | Synonyms: scrag |
| (verb) impair the respiration of or obstruct the air passage of | Synonyms: asphyxiate, stifle, suffocate |
| (verb) check or slow down the action or effect of | - |
| (verb) fail to perform adequately due to tension or agitation | - |
| chokecherry | (noun) a common wild cherry of eastern North America having small bitter black berries favored by birds | Synonyms: chokecherry tree, Prunus virginiana |
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| (noun) the fruit of the chokecherry tree | - |
| choked | (adjective) stopped up; clogged up | Synonyms: clogged |
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| chokedamp | (noun) the atmosphere in a mine following an explosion; high in carbon dioxide and incapable of supporting life | Synonyms: blackdamp |
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| chokehold | (noun) a restraining hold; someone loops the arm around the neck of another person in a tight grip, usually from behind | Synonyms: choke hold |
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| (noun) complete power over a person or situation | Synonyms: stranglehold, throttlehold |
| chokepoint | (noun) a point of congestion or blockage | - |
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| (noun) a narrowing that reduces the flow through a channel | Synonyms: bottleneck, constriction |
| choker | (noun) a high tight collar | Synonyms: neck ruff, ruff, ruffle |
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| (noun) necklace that fits tightly around a woman's neck | Synonyms: collar, dog collar, neckband |
| (noun) someone who kills by strangling | Synonyms: garroter, garrotter, strangler, throttler |
| (noun) an unfortunate person who is unable to perform effectively because of nervous tension or agitation | - |
| chokey | (noun) British slang (dated) for a prison | Synonyms: choky |
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| choking | (adjective) causing difficulty in breathing especially through lack of fresh air and presence of heat | Synonyms: smothering, suffocating, suffocative |
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| (noun) the act of suffocating (someone) by constricting the windpipe | Synonyms: strangling, strangulation, throttling |
| (noun) a condition caused by blocking the airways to the lungs (as with food or swelling of the larynx) | - |
| choky | (adjective) so tight as to tend to choke | - |
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| (noun) British slang (dated) for a prison | Synonyms: chokey |
| cholangiography | (noun) roentgenographic examination of the bile ducts after a contrast medium has been injected | - |
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| cholangitis | (noun) inflammation of the bile ducts | - |
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| cholecalciferol | (noun) a fat-soluble vitamin that prevents rickets | Synonyms: calciferol, D, ergocalciferol, viosterol, vitamin D |
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| cholecystectomy | (noun) surgical removal of the gall bladder (usually for relief of gallstone pain) | - |
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| cholecystitis | (noun) inflammation of the gall bladder | - |
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| cholecystokinin | (noun) a gastrointestinal hormone that stimulates the secretion of pancreatic enzymes and the contraction and emptying of the gall bladder; its release is stimulated by the presence of fatty acids and amino acids in the small intestine | - |
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| cholelithiasis | (noun) the presence of gallstones in the gallbladder | - |
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| cholelithotomy | (noun) removal of gallstone through an incision in the gallbladder | - |
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| choler | (noun) a humor that was once believed to be secreted by the liver and to cause irritability and anger | Synonyms: yellow bile |
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| (noun) a strong emotion; a feeling that is oriented toward some real or supposed grievance | Synonyms: anger, ire |
| (noun) an irritable petulant feeling | Synonyms: crossness, fretfulness, fussiness, irritability, peevishness, petulance |
| cholera | (noun) an acute intestinal infection caused by ingestion of contaminated water or food | Synonyms: Asiatic cholera, epidemic cholera, Indian cholera |
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| choleraic | (adjective) relating to or resulting from or resembling cholera | - |
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| choleric | (adjective) characterized by anger | Synonyms: irascible |
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| (adjective) quickly aroused to anger | Synonyms: hot-tempered, hotheaded, irascible, quick-tempered, short-tempered |
| (adjective) easily moved to anger | - |
| cholestasis | (noun) a condition in which little or no bile is secreted or the flow of bile into the digestive tract is obstructed | Synonyms: acholia |
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| cholesterin | (noun) an animal sterol that is normally synthesized by the liver; the most abundant steroid in animal tissues | Synonyms: cholesterol |
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| cholesterol | (noun) an animal sterol that is normally synthesized by the liver; the most abundant steroid in animal tissues | Synonyms: cholesterin |
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| choline | (noun) a B-complex vitamin that is a constituent of lecithin; essential in the metabolism of fat | - |
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| cholinergic | (adjective) releasing or activated by acetylcholine or a related compound | - |
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| cholinesterase | (noun) an enzyme that hydrolyses acetylcholine (into choline and acetic acid) | - |
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| cholla | (noun) arborescent cacti having very spiny cylindrical stem segments; southwestern United States and Mexico | Synonyms: Opuntia cholla |
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| chomp | (noun) the act of gripping or chewing off with the teeth and jaws | Synonyms: bite |
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| (verb) chew noisily or vigorously | Synonyms: champ |
| chomping | (noun) the act of chewing noisily | - |
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| chon | (noun) 100 chon equal 1 won in North Korea | - |
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| (noun) 100 chon equal 1 won in South Korea | - |
| chondrichthian | (noun) fishes in which the skeleton may be calcified but not ossified | Synonyms: cartilaginous fish |
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| chondrify | (verb) turn into cartilage | - |
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| chondrin | (noun) a substance that resembles gelatin and is obtained by boiling cartilage in water | - |
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| chondriosome | (noun) an organelle containing enzymes responsible for producing energy | Synonyms: mitochondrion |
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| chondrite | (noun) a rock of meteoric origin containing chondrules | - |
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| chondritic | (adjective) having a granular structure like that of chondrites | Synonyms: granular |
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| chondrodystrophy | (noun) an inherited skeletal disorder beginning before birth; cartilage is converted to bone resulting in dwarfism | Synonyms: achondroplasia, achondroplasty, osteosclerosis congenita |
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| chondroma | (noun) a common benign tumor of cartilage cells | - |
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