| at ease(expression, adjective, calm, relaxed, tranquil) |
| austerely |
| bad |
| barren |
| calmed(adjective, calm, relaxed, tranquil, easygoing) |
| casual(adjective, calm, indifferent, restrained, aloof) |
| clear-headed(adjective, calm, quiet, reasonable, sensible) |
| clearheaded(adjective, calm, relaxed, tranquil, easygoing) |
| close(adjective, severe, warm, modest, thoughtful) |
| cold sober(expression, adjective, dull, quiet, set) |
| comfy |
| commonsensical(adjective, calm, relaxed, tranquil, easygoing) |
| constant(adjective, firm, sensible, solid, steady) |
| constrained(adjective, calm, quiet, reasonable, sensible) |
| cool as cucumber(expression, adjective, idiom, calm, cool) |
| cool headed |
| deadpan(adjective, unexcitable) |
| deep(adjective, sober, serious, solemn) |
| deliberate(calm, cool, sober, serious, somber) |
| determined(adjective, set, severe, honest, sensible) |