| carefree(adjective, strong, easy, solid, certain) |
| certain(adjective, strong, easy, solid, definite) |
| cinch(adjective, strong, easy, solid, certain) |
| clearheaded(adjective, calm, relaxed, tranquil, easygoing) |
| commonsensical(adjective, calm, relaxed, tranquil, easygoing) |
| competent |
| complacent(adjective, superior, certain, sure, satisfied) |
| conceited(happy, rude, superior, certain, sure) |
| cool as cucumber(expression, adjective, idiom, calm, relaxed) |
| detached |
| dignified(adjective, composed) |
| disimpassioned(adjective, calm, relaxed, tranquil, easygoing) |
| dispassionate(adjective, calm, relaxed, tranquil, easygoing) |
| easy(adjective, calm, strong, smooth, relaxed) |
| easygoing(adjective, calm, relaxed, tranquil, serene) |
| egotistic(happy, rude, satisfied, pleased, arrogant) |
| equanimous |
| equilibrious |
| expectant(adjective, certain, cheerful, sure, confident) |
| expecting(adjective, certain, sure, confident, assured) |