nouveau riche

from The Collaborative International Dictionary of English v.0.48

Nouveau riche \Nou`veau" riche"\, m., Nouvelle riche \Nou`velle"
riche"\, f.; pl. m. {Noveaux riches}, f. {Nouvelles riches}.
   [F.]
   A person newly rich. Contrasted with {old money}.
   [Webster 1913 Suppl. +PJC]

from Moby Thesaurus II by Grady Ward, 1.0

63 Moby Thesaurus words for "nouveau riche":
      Babbitt, Philistine, Young Turk, adventurer, arriviste, boor,
      bounder, bourgeois, bourgeois gentilhomme, bright young man, cad,
      churl, clown, comer, epicier, fledgling, groundling, guttersnipe,
      hooligan, ill-bred fellow, looby, lout, low fellow, modern,
      modern generation, modern man, modernist, modernizer, mucker,
      mushroom, name-dropper, neologism, neologist, neology, neonate,
      neoteric, neoterism, neoterist, new generation, new man,
      newly-rich, nouveau roturier, novus homo, parvenu, peasant,
      pig in clover, ribald, rising generation, roturier, rough,
      roughneck, rowdy, ruffian, social climber, sprout, status seeker,
      stripling, tufthunter, upstart, vulgarian, vulgarist,
      would-be gentleman, yokel