Synonyms of mirthful

1 Syllable
gay, joyous, glad
2 Syllables
blither, blithe, jollying, campy, screamer, jovial, rioter, happiest, cheerful, larking, merry, coltish, merrier, merriest, gleeful, grooving, jocund, perky, zappy, zingy, festal, jollier, zingier, happier, blithest, sunny, playful, happy, booner, gladdest, joyful, funnier, har-har, tickled, funniest, waggish, chirpy, campiest, laughing, cheery, jolly, funny
3 Syllables
riproaring, enjoyable, fun-loving, rip-roaring, gladsome, laughable, festive, convivial, gelastic, rejoicing, vivacious, backslapping, carefree, lighthearted, amusing, lively, hilarious, back-slapping
4 Syllables
entertaining, frolicsome, blithesome, saturnalian, derisory, conversable, conversible, glad-handering
5 Syllables
carnivalesque