The Collaborative International Dictionary of English v.0.48:

Self-righteousness \Self`-right"eous*ness\, n.
   The quality or state of being self-righteous; pharisaism.
   [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

26 Moby Thesaurus words for "self-righteousness":
   Tartuffery, Tartuffism, affectation, cant, false piety, falseness,
   goody-goodiness, hypocrisy, insincerity, mealymouthedness, mummery,
   oiliness, pharisaicalness, pharisaism, pietism, pietisticalness,
   piety, piousness, religionism, religiosity, sanctimoniousness,
   sanctimony, snivel, snuffle, unction, unctuousness