| cabal | a small group of secret plotters, as against a government or person in authority. |
| cadge | to borrow without intent to repay |
| cajole | to persuade by flattery or promises; wheedle; coax |
| calumny | a false and malicious statement designed to injure the reputation of someone or something |
| candid | frank; outspoken; open and sincere |
| cant | insincere, esp. conventional expressions of enthusiasm for high ideals, goodness, or piety |
| cantankerous | Ill-tempered and quarrelsome; disagreeable |
| canvass | to examine carefully; investigate by inquiry; discuss; debate |
| castigate | to criticize or reprimand severely |
| caustic | severely critical or sarcastic |