| A | B |
| Copious | adj abundant; plentiful |
| Corollary | n a proposition that follows easily and obviously from another; a natural consequence or conclusion |
| Corrugated | adj shaped with folds or waves |
| Coterie | n a group of close associates; a circle (of friend or associates) |
| Cower | v to shrink away or huddle up in fear |
| Crass | adj extremely unrefined; gross; stupid |
| Craven | adj cowardly |
| Crestfallen | adj dejected; dispirited |
| Crux | n the central point; the essence |
| Cuisine | n a style of cooking |
| Cull | v to pick out among many; to collect |
| Curb | v to restrain or control |
| Curmudgeon | n a difficult |
| Cursory | adj quick and unthorough; harsh; superficial |