Synonyms of hilariously

2 Syllables
lightly, gladly, freely, brightly, joyously, buoyantly, gaily
3 Syllables
willingly, lovingly, merrily, cheerfully, heartily, agreeably, jovially, playfully, happily, blissfully, blithely, gleefully, joyfully, graciously, laughingly, smilingly, zestfully
4 Syllables
devotedly, delightfully, sincerely, peacefully, vivaciously, contentedly, delightedly, elatedly, exultantly, lightheartedly, sportively
6 Syllables
enthusiastically, exhilaratingly, optimistically