a.
1.
Pleasant, agreeable, exhilarating, delightful, brisk, lively, stirring.
2.
Mirthful, jovial, gleeful, gay, hilarious, sportive, jocund, joyous, facetious, lively, jolly, buxom, frolicsome, blithe, blithesome, airy, gladsome, vivacious, wanton, light-hearted, cheerful.
3.
Mirthful, sportive, comical, droll, gleeful, funny, sprightly.
4.
Sarcastic, satirical.