Synonyms of carefree

1 Syllable
cool, buoyant, calm
2 Syllables
blither, blithe, feelgood, jovial, airy, cheerful, larking, merry, jaunty, merrier, merriest, grooving, mirthful, blithest, zappy, zingy, jollier, zingier, prankish, sunny, breezy, radiant, happy, jauntier, booner, easy, chirpy, reckless, cheery, jolly, feckless
3 Syllables
unanxious, riproaring, hang-loose, outgiving, unworried, easygoing, relaxed, rollicking, rip-roaring, gladsome, nonformal, secure, free-minded, easy-going, careless, insouciant
4 Syllables
unbothered, blithesome, gamesome, saturnalian, harum-scarum, uncareful
5 Syllables
irresponsible, happy-go-lucky
7 Syllables
overventuresome