| calm(adjective, cool, restrained, detached, sober) |
| cantankerous(adjective, hard, tough, severe, cold) |
| casual(adjective, calm, indifferent, restrained, detached) |
| chill(adjective, cool, flat, detached, blank) |
| chilly(adjective, indifferent, detached, distant, remote) |
| churlish(adjective, hard, tough, severe, cold) |
| cold-blooded(adjective, hard, cool, tough, severe) |
| cold-hearted(adjective, hard, tough, severe, cold) |
| cool cat(expression, adjective, cool, detached, blank) |
| crotchety(adjective, hard, tough, severe, cold) |
| deadened(adjective, hard, tough, severe, cold) |
| deadpan(adjective, cool, flat, detached, blank) |
| detached(adjective, cool, indifferent, blank, sober) |
| dispassionate(adjective, calm, cool, restrained, detached) |
| distant(adjective, cool, indifferent, detached, blank) |
| dogged(adjective, mean, hard, harsh, inflexible) |
| easy-going(adjective, calm, restrained, unconcerned, subdued) |
| emotionless(adjective, detached, blank, unfeeling, impassive) |
| exacting(adjective, hard, tough, severe, harsh) |
| feelingless(adjective, hard, tough, severe, cold) |