From The Collaborative International Dictionary of English v.0.44 [gcide]:
2. The state of being extravagant, wild, or prodigal beyond bounds of propriety or duty; want of moderation; excess; especially, undue expenditure of money; vaid and superfluous expense; prodigality; as, extravagance of anger, love, expression, imagination, demands.
From WordNet (r) 2.0 [wn]:
From Moby Thesaurus II by Grady Ward, 1.0 [moby-thes]:
300 Moby Thesaurus words for "extravagance": abandon, absurdity, abundance, affluence, aggrandizement, amenity, ample sufficiency, ampleness, amplification, amplitude, avalanche, ballyhoo, bedizenment, big talk, bigotry, blatancy, blowing up, bonanza, boundlessness, bountifulness, bountiousness, brazenness, bumper crop, burlesque, capriciousness, caricature, carpe diem, cloud of words, colorfulness, copiousness, crapulence, crapulency, crapulousness, crudeness, dash, dazzle, dazzlingness, deluge, diffuseness, diffusion, diffusiveness, dilatation, dilation, dissipation, drunkenness, duplication, duplication of effort, effusion, effusiveness, egregiousness, embarras de richesses, embellishment, enhancement, enlargement, enormousness, enough, exaggerating, exaggeration, excess, excessiveness, exorbitance, exorbitancy, expansion, expletive, extortionateness, extravagancy, extravaganza, extravagation, extreme, extremeness, extremes, extremism, extremity, exuberance, fabulousness, fanaticalness, fanaticism, fantasy, fat, featherbedding, fecundity, fertility, filling, flagrancy, flamboyance, flashiness, flightiness, flood, flow, fluency, foison, formlessness, frill, frills, frippery, full measure, fullness, gaiety, garishness, gaudery, gaudiness, generosity, generousness, giantism, gigantism, gingerbread, glare, glitter, gluttony, gorgeousness, grandiloquence, great abundance, great plenty, gush, gushing, heightening, huckstering, hyperbole, hyperbolism, hypertrophy, immoderacy, immoderateness, immoderation, improvidence, incontinence, indiscipline, indulgence, inflation, inordinacy, inordinance, inordinateness, intemperance, intemperateness, inundation, irrationality, jauntiness, jazziness, landslide, lavishness, leaking purse, liberality, liberalness, logorrhea, loose purse strings, lots, loudness, luridness, luxuriance, luxury, macrology, magnification, maximum, meretriciousness, money to burn, monstrousness, more than enough, much, myriad, myriads, needlessness, nimiety, numerousness, obtrusiveness, opulence, opulency, ornamentation, outpour, outpouring, outrageousness, overabundance, overaccumulation, overadornment, overbounteousness, overcopiousness, overdevelopment, overdoing, overdose, overemphasis, overenthusiasm, overestimation, overflow, overgenerosity, overgenerousness, overgreatness, overgrowth, overindulgence, overkill, overlap, overlargeness, overlavishness, overliberality, overluxuriance, overmeasure, overmuch, overmuchness, overnumerousness, overplentifulness, overplenty, overpopulation, overprofusion, overreaction, overreligiousness, overstatement, oversufficiency, oversupply, overzealousness, padding, palilogy, panache, payroll padding, perfervidness, plenitude, plenteousness, plentifulness, plenty, pleonasm, plethora, pound-foolishness, preposterousness, prevalence, prodigality, productiveness, productivity, profligacy, profuseness, profusion, prolificacy, prolificity, prolixity, puffery, puffing up, quantities, rabidness, radicalism, rampancy, rankness, reckless expenditure, reckless spending, recklessness, redundance, redundancy, reiteration, reiterativeness, repetition for effect, repetitiveness, repleteness, repletion, rich harvest, rich vein, richness, riot, riotousness, scads, self-indulgence, sensationalism, shamelessness, shower, showiness, spate, sportiness, squander, squandering, squandermania, stream, stretching, substantiality, substantialness, superabundance, superfluity, superfluousness, superflux, superlative, swinishness, talkativeness, tall talk, tautology, tawdriness, teemingness, tirade, too much, too-muchness, touting, travesty, ultrazealousness, unconscionableness, unconstraint, uncontrol, undueness, unnecessariness, unreasonableness, unrestrainedness, unrestraint, verbosity, vulgarness, waste, wastefulness, wealth, whim, zealotism, zealotry
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