| at ease(expression, adjective, calm, relaxed, tranquil) |
| believable(adjective, open, sound, honest, sensible) |
| brainy(adjective, reasonable, keen, sensible, deep) |
| businesslike(hard, sound, reasonable, sensible, practical) |
| calculating(adjective, reasonable, keen, deep, rational) |
| calmed(adjective, calm, relaxed, tranquil, easygoing) |
| cerebral(adjective, sound, reasonable, sensible, rational) |
| civil(adjective, quiet, cool, moderate, gentle) |
| clear-cut(adjective, sound, sensible, rational, intelligent) |
| clear-headed(adjective, calm, quiet, reasonable, sensible) |
| clearheaded(adjective, calm, relaxed, tranquil, easygoing) |
| cogent(adjective, good, reasonable, honest, sensible) |
| cogitative(adjective, reasonable, keen, deep, rational) |
| cognitive(adjective, sound, reasonable, sensible, rational) |
| cold(adjective, calm, sensible, dark, restrained) |
| consequent(adjective, good, sound, sensible, rational) |
| consistent(adjective, sound, sensible, rational, intelligent) |
| constant(adjective, pleasant, reasonable, moderate, firm) |
| constrained(adjective, calm, quiet, reasonable, sensible) |
| contemplative(adjective, reasonable, keen, deep, rational) |