The Collaborative International Dictionary of English v.0.48:

Cynicism \Cyn"i*cism\ (s[i^]n"[i^]*s[i^]z'm), n.
   The doctrine of the Cynics; the quality of being cynical; the
   mental state, opinions, or conduct, of a cynic; morose and
   contemptuous views and opinions.
   [1913 Webster]

WordNet (r) 3.0 (2006):

cynicism
    n 1: a cynical feeling of distrust

Moby Thesaurus II by Grady Ward, 1.0:

23 Moby Thesaurus words for "cynicism":
   Timonism, antisocial sentiments, antisociality, causticity,
   defeatism, dismalness, gloominess, gloomy outlook, innuendo,
   invective, irony, malism, misanthropism, misanthropy, negativism,
   nihilism, pessimism, retreatism, sarcasm, satire, satiric wit,
   uncheerfulness, unsociability