| Word | Definition |
| Champion | to support militantly |
| Chaotic | disorder |
| Charisma | divine gift; great popular charm or appeal |
| Charlatan | pretender to knowledge |
| Chary | Cautious; sparing or restrained about giving |
| Chase | to ornament a surface by indenting |
| Chasm | abyss |
| Chassis | the supporting frame of a structure (automobile or house) |
| Chaste | pure; virginal; modest |
| Chasten | discipline; punish in order to correct |
| Chastise | to punish |
| Chauvinist | excessive or blind patriotism; zealous adherent of a group or cause |
| Check | to stop motion; curb or restrain |
| Checkered | marked by changes in fortune |
| Cherubic | angelic; innocent-looking |
| Chicanery | trickery; deception |
| Chimerical | fantastically improbable; highly unrealistic; imaginative |
| Chisel | wedgelike tool for cutting |
| Chisel | swindle or cheat; cut with a chisel |
| Chivalrous | courteous; faithful; brave |
| Choleric | hot-tempered |
| Choreography | art of representing dances in written symbols; arrangement of dances |
| Chortle | chuckle with delight |
| Chronic | long established, as a disease |
| Chronicle | to report; to record (in chronological order) |
| Churlish | boorish; rude |
| Ciliated | having minute hairs |
| Cipher | nonentity; worthless person or thing |
| Cipher | secret code |
| Circlet | small ring; band |
| Circuitous | roundabout |
| Circumlocution | indirect or roundabout expression |
| Circumscribe | to limit; to confine |
| Circumspect | prudent; cautious |
| Circumvent | to outwit; to baffle |
| Cistern | reservoir or water tank |
| Citadel | fortress |
| Cite | to quote; to commend |
| Civil | having to do with citizens or the state; courteous and polite |
| Clairvoyant | having foresight; fortuneteller |
| Clamber | to climb by crawling |
| Clandestine | secret |
| Clangor | loud, resounding noise |
| Clapper | striker (tongue) of a bell |
| Clarion | shrill, trumpetlike sound |
| Claustrophobia | fear of being locked in |
| Clavicle | collarbone |
| Cleave | to split or sever; to cling to; to remain faithful to |
| Cleft | split |
| Clemency | disposition to be lenient; mildness, as of the weather |
| Cliche | phrase dulled in meaning by repetition |
| Clientele | body of customers |
| Climactic | relating to the highest point |
| Clime | region; climate |
| Clique | small, exclusive group |
| Cloister | monastery or convent |
| Clout | influence <political clout> |
| Cloying | distasteful; excessively sweet or sentimental |
| Coagulate | to thicken; to congeal; to clot |
| Coalesce | to combine; to fuse |
| Coddle | to pamper |
| Codicil | supplement to the body of a will |
| Codify | to arrange (laws, rules) as a code; to classify |
| Coercion | use of force to get someone to obey |
| Coeval | equally old; contemporary |
| Cog | tooth projecting from a wheel |
| Cogent | convincing or believable |
| Cogitate | to think over |
| Cognate | related linguistically; allied by blood; similar or akin in nature |
| Cognitive | pertaining to mental processes |
| Cognizance | knowledge; awareness |
| Cohabit | to live together |
| Cohere | to stick together |
| Cohesion | tendency to keep together |
| Cohorts | a group or company; armed band |
| Coiffure | hairstyle |
| Coin | to make coins; to invent or fabricate |
| Coincidence | the chance occurrence, at same time, of two or more seemingly connected event |
| Colander | perforated container for draining food |
