| worry-free |
| careless(adjective, happy, relaxed, cheerful, cheery) |
| easy-going(adjective, happy, relaxed, cheerful, cheery) |
| listless |
| able(adjective, strong, easy, solid, certain) |
| absolute(adjective, strong, easy, solid, certain) |
| airy(adjective, happy, relaxed, cheerful, cheery) |
| apathetic |
| assured(adjective, strong, easy, solid, certain) |
| at ease(expression, adjective, calm, strong, easy) |
| balanced(adjective, strong, easy, solid, certain) |
| blase |
| breezy(adjective, happy, relaxed, cheerful, happy-go-lucky) |
| buoyant(adjective, happy, relaxed, cheerful, cheery) |
| calm(adjective, happy, informal, relaxed, tranquil) |
| carefree(adjective, calm, strong, smooth, pleasant) |
| casual |
| certain(adjective, strong, easy, solid, definite) |
| cheery(adjective, happy, relaxed, cheerful, happy-go-lucky) |
| cinch(adjective, strong, easy, solid, certain) |