The Collaborative International Dictionary of English v.0.48:

Flatulence \Flat"u*lence\, Flatulency \Flat"u*len*cy\, n. [Cf.
   F. flatulence.]
   The state or quality of being flatulent.
   [1913 Webster]

WordNet (r) 3.0 (2006):

flatulence
    n 1: a state of excessive gas in the alimentary canal [syn:
         flatulence, flatulency, gas]
    2: pompously embellished language [syn: turgidity,
       turgidness, flatulence]

Moby Thesaurus II by Grady Ward, 1.0:

90 Moby Thesaurus words for "flatulence":
   Barnumism, aeriness, affectation, bedizenment, big talk, bloat,
   bloatedness, bloating, blowing up, convolution, diastole,
   dilatation, dilation, distension, dropsy, edema, ethereality, fart,
   flashiness, flatulency, flatuosity, flatus, fluidity, fulsomeness,
   garishness, gas, gaseity, gaseous state, gaseousness, gassiness,
   gaudiness, grandiloquence, grandioseness, grandiosity,
   high-flown diction, inflatedness, inflation, intumescence,
   lexiphanicism, loftiness, luridness, magniloquence, mere rhetoric,
   meretriciousness, meteorism, orotundity, ostentation,
   ostentatious complexity, platitudinous ponderosity,
   polysyllabic profundity, pomposity, pompous prolixity, pompousness,
   pontification, pretension, pretentiousness, prose run mad, puff,
   puffiness, puffing, rhetoric, rhetoricalness, sensationalism,
   sententiousness, showiness, stiltedness, stretching, swell,
   swellage, swelling, swelling utterance, swollen phrase,
   swollenness, tall talk, tortuosity, tortuousness, tumefaction,
   tumescence, tumidity, tumidness, turgescence, turgidity,
   turgidness, tympanism, tympany, vapor pressure, vaporiness,
   vaporousness, wind, windiness