a.
1.
Merry, jovial, gay, lively, festive, joyful, joyous, cheery, hilarious, cheerful, jocund, vivacious, jolly, playful, sportive, frolicsome.
2.
Funny, comic, droll, merry, jocose, jocular, humorous, sportive, witty, facetious, waggish, ludicrous.