earnestness, serious-mindedness, seriousness, sincerity

silliness, merriment, whimsy, jollity, revelry, playfulness, tomfoolery, extravagance, zaniness, bacchanalia, frippery, joviality, sentimentality, gaiety, decadence, bawdiness, irreverence, pretension, high jinks, naughtiness, debauchery, hedonism, glitz, ostentation, jolliness, inanity, hilarity, eccentricity, tawdriness, pretentiousness, jocularity, levity, lightheartedness, superficiality, indulgence, giddiness, ribaldry, overindulgence, foolery, crassness, cheekiness, dullness, buffoonery, pompousness, joie de vivre, exuberance, saturnalia, showiness, frivolousness, razzmatazz, kitsch, pageantry, fustiness, boisterousness, drunken revelry, joyousness, pomposity, conviviality, merrymaking, mirth, absurdity, gaucheness, romanticism, grandiloquence, commercialism, festiveness, spontaneity, triviality, trashiness, friskiness, bathos, vapidity, glamor, folderol, childishness, sentimentalism, homeliness, banality, insipidity, escapism, foppery, cheeriness, festivity, lunacy, weirdness, triteness, garishness, fabulousness, craziness, snootiness, opulence, smugness, snobbery, tackiness, gluttony, dreariness, facetiousness, sordidness, bacchanal, frolics, puerility, joylessness, fickleness, affectation, carelessness, flippancy, recklessness, timidity, foolishness, thoughtlessness, vanity, frivolities, bravado, cowardice, cynicism, imprudence, perversity

fun

airheaded, dizzy, empty-headed, featherbrained, fragonard, giddy, jean honore fragonard, leaning, light-headed, lightheaded, silly

folly, stuff, sundries, sundry, trait, whatchamacallit, whatsis

bagatelle, clowning, fluff, harlequinade, prank