WordNet (r) 3.0 (2006):

flamboyance
    n 1: extravagant elaborateness; "he wrote with great
         flamboyance" [syn: flamboyance, floridness,
         floridity, showiness]

Moby Thesaurus II by Grady Ward, 1.0:

78 Moby Thesaurus words for "flamboyance":
   arabesque, baroque, baroqueness, blare, blatancy, blaze,
   blazing light, blinding light, brazenness, bright light,
   brightness, brilliance, brilliancy, brilliant light,
   burst of light, chinoiserie, colorfulness, crudeness, dash, dazzle,
   dazzling light, dazzlingness, effulgence, elaborateness, elegance,
   extravagance, extravaganza, extravagation, fanciness, fineness,
   flagrancy, flashiness, flood of light, floridity, floridness,
   floweriness, fulgor, gaiety, garishness, gaudery, gaudiness, glare,
   glaring light, glitter, glory, gorgeousness, jauntiness, jazziness,
   loudness, luridness, luxuriance, luxuriousness, meretriciousness,
   moresque, obtrusiveness, ostentation, overelaborateness,
   overelegance, overornamentation, panache, radiance, radiancy,
   radiant splendor, refulgence, refulgency, resplendence,
   resplendency, richness, rococo, sensationalism, shamelessness,
   showiness, splendor, sportiness, streaming light, tawdriness,
   vividness, vulgarness