| A | B |
| Coagulate | To thicken |
| Coalition | A combination; an alliance for joint action |
| Company | A group of people; an association |
| Compel | To force |
| Complacent | Too content self satisfied |
| Comply | To give in to; to go along with |
| Compress | To squeeze together |
| Compromise | An agreement reached by mutual concessions |
| Concoction | Something that is prepared by combining ingredients |
| Concurrent | Going on the same time as something else |
| Condense | To make more compact |
| Condescend | To lower oneself to the level of inferiors; to act in a superior manner |
| Condiment | Seasoning or spice |
| Congeal | To thicken or freeze |
| Congregation | A gathering of people for worship |
| Congruence | Agreement; harmony |
| Conjugation | A listing of verb forms |
| Contemporary | Happening in the present time; current |
| Context | Setting; words that surround a portion of writing that help convey the meaning |
| Coordinate | To harmonize; to bring together well |