The Collaborative International Dictionary of English v.0.48:

Snobbery \Snob"ber*y\, n.
   The quality of being snobbish; snobbishness.
   [1913 Webster]

WordNet (r) 3.0 (2006):

snobbery
    n 1: the trait of condescending to those of lower social status
         [syn: snobbery, snobbism, snobbishness]

Moby Thesaurus II by Grady Ward, 1.0:

40 Moby Thesaurus words for "snobbery":
   affectation, clannishness, cliquishness, conceit, condescension,
   contemptuousness, disdain, disdainfulness, egotism, exclusiveness,
   haughtiness, hauteur, inflatedness, loftiness, lordliness,
   narcissism, pomposity, pompousness, presumptuousness, pretension,
   pretentiousness, priggishness, priggism, selectiveness,
   selectivity, selectness, self-admiration, self-importance,
   smugness, sniffiness, snobbiness, snobbishness, snobbism,
   snootiness, snottiness, superciliousness, tufthunting, uppishness,
   vainness, vanity