Synonyms of happy

1 Syllable

light, gay, joyous, apt, fit, pat, glad, meet, blest, rapt, up

2 Syllables

cheerier, lucky, willing, halcyon, sunny, playful, fitter, tickled, go-go, sparkling, chirpy, blissful, cheery, chanced, cordial, chancing, upbeat, luckier, timeous, laughing, jolly, blithe, tipsy, larking, gleeful, pleased, golden, mirthful, perky, luckiest, proper, fitting, joyful, chipper, apter, cheerful, merry, content, dexter, jollier, pleasant, peppy, chancer, fittest, meeter, thrilled, pater, aptest, jokey, gogo, blessed, triumphant, tipsier

3 Syllables

panglossian, peaceful, rollicking, gladsome, red-letter, congenial, carefree, complacent, lighthearted, livelier, successful, satisfied, nonchalant, propitious, lightsome, vivacious, debonair, delighted, hilarious, back-slapping, befitting, light-hearted, rapturous, fortuitous, backslapping, beseeming, overjoyed, auspicious, ecstatic, amical, jocular, beatific, convivial, jubilant, exultant, elated, liveliest, contented, gratified, enchanted, bestselling, festive, suitable, red-carpet, lively, promising, lucky-dog

4 Syllables

rose-colored, unexcited, frolicsome, prizewinning, captivated, optimistic, comfortable, conversible, glad-handering, opportune, fortunate, blithesome, felicitous, animated, loose-fitting

5 Syllables

unimpressible, carnivalesque, celebratory, intoxicated, disimpassioned, serendipitous