WordNet (r) 3.0 (2006):

fart
    n 1: a reflex that expels intestinal gas through the anus [syn:
         fart, farting, flatus, wind, breaking wind]
    v 1: expel intestinal gases through the anus [syn: fart,
         break wind]

Moby Thesaurus II by Grady Ward, 1.0:

27 Moby Thesaurus words for "fart":
   SOB, bastard, break wind, bugger, creep, flatulence, flatulency,
   flatuosity, flatus, gas, heel, hood, hooligan, jerk, lay a fart,
   louse, meanie, mother, pill, rat, shit, shithead, shitheel,
   stinkard, stinker, turd, wind