Synonyms Letter C

 cajole—coax, persuade, wheedle (to convince by asking nicely)

 camaraderie—friendship, companionship, togetherness

 candid—truthful, straightforward, unrehearsed

 candor—honesty, directness, veracity (truthfulness)

 capricious—willful, arbitrary, impulsive (acting without thought)

 captivate—dazzle, enchant, fascinate

caustic—burning, hurtful, sarcastic (cutting or mocking)

 chaos—disorder, confusion, pandemonium (an uproar or hubbub)

 circumvent—go around, avoid, elude (to get away from)

 clandestine—secret, undercover, covert, surreptitious (hidden)

 cloying—sticky, sentimental, clingy

 coerce—force, bully, pressure 

cogent—powerful, logical, persuasive

 cognizant—aware, informed, sentient (conscious)

 coherent—understandable, clear

 cohesive—close-knit, unified, interconnected

 collaborate—work together, cooperate, join forces

 commend—praise, applaud, honor

 compatible—harmonious, well-suited, congenial (friendly)

 compel—force, require, pressure

 competent—skilled, qualified, proficient (good at)

 complacent—self-satisfied, comfortable, smug (self-satisfied)

 comply—obey, conform, follow

 comprehensive—thorough, inclusive, complete

 concise—short, to the point, succinct (brief)

 condescending—rude, snobbish

 confident—sure, convinced, positive

 conform—comply, submit, follow

 conformity—compliance, submission

 congested—packed, jammed, blocked

 congruent—alike, matching, harmonious (goes well together)

 consensus—agreement, compromise, harmony

 consequential—important, major, meaningful

 conservative—traditional, old-fashioned, conventional

 constant—steady, persistent, incessant (unceasing)

 constrain—hold back, restrict, inhibit (to slow down or prevent)

 consummate—ideal, perfect, superlative (the best)

contaminate—pollute, spoil, taint (to spoil or damage)

 contemporary—modern, up to date, new

 contradict—disagree, oppose, challenge

 conventional—usual, established, typical

 converge—meet, come together, join

 convey—tell, express, communicate

 convoluted—complex, difficult

 corroborate—confirm, support, substantiate (to back up with evidence)

 corrupt—dishonest, shady, crooked

 covert—secret, hidden, underground

 criticize—disparage (to cut down), denigrate (to put down)

 culpable—responsible, guilty, at fault

 curtail—cut back, limit, shorten, restrict