| cautious(adjective, reasonable, predictable) |
| cerebral(adjective, calm, steady, reserved) |
| chary(adjective, person, temper, stability) |
| chronic(adjective, firm, steady, fixed, constant) |
| clear-headed(adjective, person, temper, behavior) |
| clear-thinking(adjective, calm, steady, reserved) |
| clearheaded(adjective, person, temper, behavior) |
| close-lipped(adjective, person, temper, stability) |
| close-tongued(adjective, person, temper, stability) |
| close lipped(adjective, person, temper, stability) |
| compensated(adjective, person, character, temper) |
| composed(adjective, person, temper, stability) |
| consistently(adjective, constant, stability, unchanged) |
| contained(adjective, person, temper, stability) |
| continent(adjective, person, temper, stability) |
| continual(adjective, firm, steady, fixed, constant) |
| continuous(adjective, firm, steady, fixed, constant) |
| cool(adjective, calm, steady, reserved) |
| cool headed(adjective, person, character, temper) |
| coolheaded(adjective, person, temper, stability) |