| A | B |
| chastise | to criticize severely |
| chimerical | absurd; wildly fanciful |
| chronic | lasting a long time; constant |
| circumspect | careful |
| clairvoyant (adjective) | having exceptional insight |
| clairvoyant (noun) | person who has power to see or know things that are beyond the range of natural vision |
| clandestine | secret |
| clemency | mercy; mildness |
| coalesce | to grow together; to combine |
| colloquial | conversational; used in informal speech or writing |
| commiserate | to sympathize with; to feel sorrow for another's suffering |