carefree (adj.)
- airy
- blase
- blithe
- breezy
- buoyant
- careless
- contented
- corky
- debonair
- easy
- easygoing
- feckless
- happy
- happy-go-lucky
- incautious
- indifferent
- insouciant
- jaunty
- light
- light-hearted
- lighthearted
- lightsome
- nonchalant
- perky
- reckless
- resilient
- unconcerned
- unworried
- wild