| cold(adjective, sober, realistic, factual, unembellished) |
| cold-blooded(adjective, sober, realistic, factual, unembellished) |
| cold-hearted(adjective, hardhearted) |
| cold fish(expression, adjective, detached, unfeeling, remote) |
| coldblooded(adjective, unfeeling, callous, hard-hearted, nowhere) |
| coldhearted(adjective, unfeeling, callous, hard-hearted, nowhere) |
| collected(adjective, serene, placid, taciturn) |
| colorless(adjective, clean, drab, banal, humdrum) |
| common(adjective, hardheaded) |
| commonplace(adjective, usual, intimate, well-known) |
| commonsense(adjective, hardheaded) |
| commonsensical(adjective, reasonable) |
| compassionless(adjective, hardhearted) |
| completely honest(expression, adjective, free, familiar, upright) |
| composed(adjective, serene, placid, taciturn) |
| concentrated(adjective, orderly, efficient, professional) |
| concrete(adjective, correct, solid, proper, true) |
| conscious(adjective, intelligent, wise, prudent) |
| consequent(adjective, intelligent, wise, prudent) |
| constructive(adjective, possible, functional, workable) |