| Cabal | plot, a secret group seeking to overturn something |
| Cache | hiding place |
| cadaver | corpse, dead body |
| Cadaverous | haggard |
| cajole | encourage, coax, flatter |
| Callow | inexperienced |
| calumny | Slander, false and malicious accusation |
| Cameo | when someone famous appears for a short time in a film or play |
| canard | hoax, a lie |
| candor (british | candour) = frankness, honesty of expression |
| Canine | pertaining to dogs |
| Canker | any ulcerous sore, any evil |
| Canny | clever and able to think quickly, especially about money or business |
| Canto | part of an extended poem |
| canvass | survey, examine thoroughly |
| Caparison | showy harnesser, ornamentation for a horse |
| Caprice | A whim |
| capricious | fickle, impulsive, whimsical, without much thought |
| Captious | fond of finding fault in others |
| Carafe | bottle |
| Cardinal | chief |
| careen | swerve, to lean on one side |
| Caricature | cartoon, exaggerated portrait |
| Carillon | a set of bells capable of being played |
| Carmine | rich red |
| Carnal | of the flesh, sensual |
| Carnivorous | meat-eating |
| Carousal | to drink deeply and in boisterous or jovial manner |
| Carp | to find faults, complain constantly |
| Carrion | decaying flesh |
| Carte blanche | complete freedom to do what you want |
| Caryatid | sculptured column of a female figure |
| Cascade | small waterfall |
| Caste | one of the hereditary classes in Hindu society |
| castigate | criticize, punish, chastise |
| Casuistry | clever argument to trick people |
| cataclysm | catastrophe, disaster |
| Catalyst | something that causes change without being changed |
| Catapult | slingshot |
| Catechism | book for religious instruction |
| Cathartic | purgative, purifying, cleansing |
| Catholic | universal, worldly |
| Caucus | a small group within an organization or a meeting of such a group |
| Cauterize (British = cauterize) | to sear |
| Cavalcade | a procession or sequence |
| Cavil | quibble, raise trivial objections |
| Cede | transfer ownership, to surrender possession of something |
| Celerity | quick moving or acting |
| Censor | to prohibit publication by law |
| Censorious | condemning speech, severely critical |
| Centaur | mythical figure, half man and half horse |
| Centripetal | tending toward the center |
| Cerebration | thought |
| Cession | Surrender, as of possessions or rights |
| Chafe | abrade |
| Chaff | worthless products of an endeavor |
| Chagrin | shame, embarrassment, humiliation |
| Chalice | goblet, cup |
| Champ | to chew noisily |
| Chaotic | in utter disorder |
| Chary | cautious, watchful, extremely shy |
| Chasm | a long, deep, narrow hole in rock or ice |
| Chaste | pure, virgin |
| Chasten | castigate |
| Chastise | to criticize or punish someone |
| Chattel | piece of personal property |
| Chauvinist | a man who thinks men are better than women |
| Cherubic | sweet, innocent |
| Chicanery | trickery, fraud, deception |
| Chide | scold, express disapproval |
| Chimerical | imaginary, impossible |
| Chiropodist | one who treats disorders of the feet |
| Chivalrous | courteous to ladies |
| Choleric | easily angered, short-tempered |
| Churlish | rude, ungracious |
| Ciliated | having minute hairs, one-celled animal |
| Cipher | zero |
| Circlet | small ring, band |
| Circumlocution | roundabout expression |
| Circumscribe | to confine within bounds |
| Circumspect | cautious, wary |
| Circumvent | evade, avoid, to go around |
| Citadel | fortress or stronghold |
| Clairvoyant | who can see the future, having ESP |
| Clamor (British = clamor) | noisy outcry |
| Clangor (British = clangor) | loud, resounding noise |
| Clarion | shrill, trumpet like sound |
| Clavicle | collarbone |
| Cleave | to split or separate, to stick, adhere |
| Cleft | split |
| Clemency | forgiveness, merciful leniency |
| Climactic | relating to the highest point |
| Clime | region, climate |
| Clique | a small group |
| Cloister | refuge, to confine, seclude |
| Cloven | split |
| Coadjutor | assistant, colleague |
| Coalesce | combine, to grow together |
| Cockade | decoration worn on hat |
| Coddle | to pamper, baby, treat indulgently |
| Codicil | supplement to a will |
| Coeval | living at the same time as contemporary |
| Cog | a spoke in a wheel, a small and unimportant person |
| Cogent | well-put, convincing, logically forceful |
| Cogitate | ponder |
| Cognate | from the same source, related |
| Cognizant | aware |
| Cognomen | family name, any name, nickname |
| Cohere | to stick together |
| Cohesion | consistency |
| Cohort | an associate |
| Colander | utensil with perforated bottom used for straining |
| Collage | a picture made by sticking small pieces of paper or other materials |
| Collate | to sort or put in proper order |
| Collier | worker in coal mine, ship carrying coal |
| Colloquy | conference |
| Collusion | conspiracy, collaboration, complicity |
| Colossal | huge |
| Comely | a woman who is attractive in appearance |
| Comestible | something fit to be eaten |
| Comeuppance | rebuke, one's deserved fate or punishment |
| Comity | courteousness, civility |
| Commodious | spacious |
| Complaisant | Agreeable, friendly |
| Complement | to make complete, perfect |
| Complicity | guilt by association, knowing partnership in wrong doing |
| Comport | to conduct oneself |
| Composure | Calmness of appearance |
| Compress | to reduce, squeeze |
| Compunction | remorse, regret |
| Conch | spiral shell |
| Conclave | private meeting |
| Concordat | Agreement |
| Concur | to agree |
| Condescend | patronize, talk down to, to treat someone as though you are better |
| Condign | adequate, deservedly severe |
| Condiment | seasoning |
| Condolence | sympathy for the family or friends of a person who has recently died |
| Conflagration | large fire, big, destructive fire |
| Confluence | flowing together, meeting of two streams, meeting place |
| Confound | bewilder, to baffle, perplex |
| Congeal | solidify, as a liquid freezing, to become thick or solid |
| Coniferous | bearing cones |
| Conjecture | hypothesis, speculation, prediction |
| Conjure | summon, to evoke a spirit, cast a spell |
| Connivance | pretence of ignorance of something wrong, assistance or permission to offend |
| Connubial | related to marriage or matrimony |
| Consanguinity | related by blood, kinship |
| Consecrate | make holy, dedicate to a goal, to declare sacred |
| Consequential | important |
| Consort | spouse |
| Constituent | electorate, component, part |
| Constraint | something that limits what you can do |
| Construe | interpret or to explain |
| Contagion | infectious agent |
| Continence | self-control, self-restraint |
| Contingent | conditional |
| Contort | twist |
| Contrite | apologetic, deeply sorrowful and repentant for a wrong |
| Controvert | dispute |
| Contumacious | rebellious |
| Contusion | A bruise |
| Conundrum | enigma, puzzle or problem with no solution, riddle |
| Convivial | sociable, festive, fond of eating, drinking, and people |
| Convoke | convene, summon, to call together |
| Coquette | woman who flirts |
| Cordon | bond, chain |
| Cormorant | greedy, rapacious bird |
| Cornice | a decorative border around the walls of a room close to the ceiling |
| Corollary | consequence |
| Corpulent | fat |
| Correlation | mutual relationship, association |
| Corroborate | to confirm, verify |
| Corrugate | to wrinkle or draw into folds |
| Corsair | pirate ship |
| Cortege | procession |
| Coruscate | sparkle |
| Coterie | small group, group of people with a common interest or purpose |
| Countenance | facial expression, to favor, support |
| Covenant | agreement, pact |
| Covetous | very desirous of something, avaricious, greedy |
| Cower | showing fear, to cringe in fear |
| Coy | shy, modest |
| Cozen | cheat, hoodwink, swindle |
| Crabbed | sour, peevish |
| Crass | crude, unrefined |
| Craven | cowardly |
| Credence | Belief, acceptance of something as true or real |
| Credo | a set of beliefs |
| Creed | Belief or principle |
| Crepuscular | pertaining to twilight |
| Crestfallen | dejected |
| Crevice | crack |
| Cringe | cower, to shrink in fear |
| Crone | hag |
| Crotchet | a fancy, a whim, an eccentricity |
| Cruet | small bottle |
| Cuisine | cookery, style of cooking |
| Cul-de-sac | a blind alley, a trap |
| Cull | pick out, select |
| Culmination | climax, final stage |
| Culpable | blameworthy, guilty, responsible for wrong |
| Culvert | drain |
| Cupidity | greed |
| Curator | in charge of a library or museum |
| Curmudgeon | boor, cranky person |
| Curry | seek favor by flattery |
| Cynosure | celebrity |