| contingency |
| conventional(adjective, usual, intimate, well-known) |
| conversant(adjective, intelligent, wise, prudent) |
| cool(adjective, aloof, distant) |
| cool as cucumber(expression, adjective, idiom, philosophic) |
| cool cat(expression, adjective, detached, unfeeling, remote) |
| correct(adjective, solid, proper, true, precise) |
| cruddy |
| crude(adjective, rough, short) |
| crusty(adjective, rough, short) |
| cursory(adjective, useful, fixed) |
| curt(adjective, rough, short) |
| customary(adjective, usual, intimate, well-known) |
| dead(adjective, cool, aloof, distant) |
| deadpan(adjective, sober, realistic, factual, unembellished) |
| deaf to(expression, adjective, callous, unexcitable, hard-as-nails) |
| declared publicly(expression, out, visible, unburdened, unplugged) |
| defined(adjective, correct, solid, proper, true) |
| definite(adjective, correct, solid, proper, true) |
| deft(adjective, correct, solid, proper, true) |