WordNet (r) 3.0 (2006):

high society
    n 1: the fashionable elite [syn: society, high society,
         beau monde, smart set, bon ton]

Moby Thesaurus II by Grady Ward, 1.0:

53 Moby Thesaurus words for "high society":
   FFVs, Vanity Fair, ancienne noblesse, aristocracy, baronage,
   baronetage, beau monde, beautiful people, best people,
   cafe society, cafe-society, carriage trade, chivalry,
   cream of society, drawing room, elect, elite, fashionable society,
   good society, haut monde, high life, in society, in-crowd, jet set,
   jet-set, jeunesse doree, knightage, lace-curtain, monde, nobility,
   noblesse, noblesse de robe, old nobility, peerage,
   people of fashion, polite society, right people, royalty, salon,
   silk-stocking, smart set, social register, socially prominent,
   societe, society, the Four Hundred, the classes, upper classes,
   upper crust, upper ten, upper ten thousand, uppercut,
   world of fashion