| cool(adjective, calm, dull, quiet, easy) |
| dispassionate(adjective, calm, dull, quiet, cool) |
| calm(adjective, quiet, cool, smooth, easy) |
| composed(adjective, calm, quiet, cool, smooth) |
| imperturbable(adjective, calm, quiet, cool, smooth) |
| serene(adjective, calm, quiet, cool, smooth) |
| impassive(adjective, calm, dull, quiet, cool) |
| nonchalant(adjective, calm, cool, steady, blank) |
| unemotional(adjective, calm, dull, quiet, cool) |
| unflappable(adjective, calm, quiet, cool, smooth) |
| collected(adjective, calm, quiet, cool, moderate) |
| easygoing(adjective, calm, quiet, easy, relaxed) |
| placid(adjective, calm, quiet, cool, smooth) |
| staid(adjective, excitability) |
| tranquil(adjective, calm, quiet, cool, smooth) |
| even-tempered(adjective, calm, quiet, smooth, easy) |
| self-possessed(adjective, calm, quiet, cool, moderate) |
| unexcited(adjective, calm, quiet, cool, moderate) |
| unruffled(adjective, calm, quiet, cool, smooth) |
| apathetic(adjective, calm, dull, cool, flat) |