| bearable(adjective, calm, soft, reasonable, gentle) |
| bloodless(calm, quiet, friendly, steady, serene) |
| brick-wall(adjective, calm, strong, secure, firm) |
| careful(adjective, calm, soft, reasonable, gentle) |
| civil(adjective, quiet, cool, kind, moderate) |
| clear |
| clement(adjective, calm, kind, smooth, soft) |
| coequal |
| comfortable |
| commensurate(adjective, calm, smooth, flat, plain) |
| common(adjective, calm, smooth, flat, plain) |
| comparable(adjective, calm, smooth, flat, plain) |
| compassionate(adjective, calm, kind, smooth, soft) |
| compatible(adjective, even, rigid, inflexible, consistent) |
| connected(adjective, dull, steady, stable, regular) |
| conservative(adjective, calm, soft, reasonable, moderate) |
| considerate(adjective, calm, soft, reasonable, gentle) |
| considered(adjective, calm, soft, reasonable, gentle) |
| continual(adjective, dull, smooth, steady, stable) |
| cool as cucumber(expression, adjective, idiom, quiet, cool) |