| barbarous(adjective, cold, cruel, unfeeling, unsympathetic) |
| bovine |
| brutal(adjective, cold, cruel, unfeeling, unsympathetic) |
| bucolic(adjective, quiet, cool, still, peaceful) |
| calmed(adjective, calm, relaxed, tranquil, easygoing) |
| candid(adjective, calm, detached, sober, unfeeling) |
| casehardened |
| civil(adjective, quiet, cool, moderate, gentle) |
| clear-headed(adjective, calm, sensible, dark, restrained) |
| clearheaded(adjective, calm, relaxed, tranquil, easygoing) |
| cold-fish(adjective, calm, detached, sober, unfeeling) |
| cold-hearted(adjective, cold, unfeeling, unsympathetic, pitiless) |
| commonsensical(adjective, calm, relaxed, restrained, tranquil) |
| constant(adjective, calm, smooth, firm, sensible) |
| constrained(adjective, calm, sensible, dark, restrained) |
| cool as cucumber(expression, adjective, idiom, calm, quiet) |
| cool cat(expression, adjective, calm, detached, sober) |
| disimpassioned(adjective, calm, cool, relaxed, steady) |
| disinterested(adjective, calm, quiet, cool, moderate) |
| distant(adjective, cool, unfriendly, aloof, unemotional) |