From The Collaborative International Dictionary of English v.0.44 [gcide]:
Note: Hilarity differs from joy: the latter, excited by good news or prosperity, is an affection of the mind; the former, produced by social pleasure, drinking, etc., which rouse the animal spirits, is more demonstrative.
From WordNet (r) 2.0 [wn]:
From Moby Thesaurus II by Grady Ward, 1.0 [moby-thes]:
89 Moby Thesaurus words for "hilarity": Homeric laughter, absurdity, absurdness, amusement, belly laugh, bizarreness, bizarrerie, boff, boffola, boisterousness, burst of laughter, cachinnation, cackle, cheerfulness, chortle, chuckle, conviviality, convulsion, crow, drollery, drollness, eccentricity, elation, exhilaration, exuberance, fit of laughter, frivolity, fun, funniness, gaiety, gales of laughter, giggle, glee, gleefulness, guffaw, ha-ha, hearty laugh, hee-haw, hee-hee, high glee, high spirits, hilariousness, ho-ho, horselaugh, humorousness, incongruity, jocularity, jocundity, jolliness, jollity, joviality, joy, joyfulness, joyousness, jubilation, laugh, laughability, laughing, laughter, levity, ludicrousness, merriment, merriness, mirth, mirthfulness, outburst of laughter, peal of laughter, pricelessness, quaintness, quizzicalness, revelry, richness, ridiculousness, risibility, roar of laughter, shout, shout of laughter, shriek, snicker, snigger, snort, tee-hee, the funny side, titter, vivacity, whimsicalness, wittiness, yuck, yuk-yuk
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