The Collaborative International Dictionary of English v.0.48:

Hypocrisy \Hy*poc"ri*sy\ (h[i^]*p[o^]k"r[i^]*s[y^]), n.; pl.
   Hypocrisies (-s[i^]z). [OE. hypocrisie, ypocrisie, OF.
   hypocrisie, ypocrisie, F. hypocrisie, L. hypocrisis, fr. Gr.
   "ypo`krisis the playing a part on the stage, simulation,
   outward show, fr. "ypokr`nesqai to answer on the stage, to
   play a part; "ypo` under + kri`nein to decide; in the middle
   voice, to dispute, contend. See Hypo-, and Critic.]
   The act or practice of a hypocrite; a feigning to be what one
   is not, or to feel what one does not feel; a dissimulation,
   or a concealment of one's real character, disposition, or
   motives; especially, the assuming of false appearance of
   virtue or religion; a simulation of goodness.
   [1913 Webster]

         Hypocrisy is the necessary burden of villainy.
                                                  --Rambler.
   [1913 Webster]

         Hypocrisy is the homage vice pays to virtue. --La
                                                  Rochefoucauld
                                                  (Trans. ).
   [1913 Webster]

WordNet (r) 3.0 (2006):

hypocrisy
    n 1: an expression of agreement that is not supported by real
         conviction [syn: hypocrisy, lip service]
    2: insincerity by virtue of pretending to have qualities or
       beliefs that you do not really have

Moby Thesaurus II by Grady Ward, 1.0:

90 Moby Thesaurus words for "hypocrisy":
   Pecksniffery, Pharisaism, Tartuffery, Tartuffism, affectation,
   affectedness, airs, airs and graces, artfulness, artificiality,
   cant, casuistry, charlatanism, charlatanry, chicanery, craft,
   cunning, deceit, deceitfulness, deception, double-dealing,
   duplicity, empty gesture, facade, fakery, false front, false piety,
   false show, falseheartedness, falseness, feigned belief, front,
   furtiveness, glibness, goody-goodiness, guile, humbug,
   hypocriticalness, image, indirection, insidiousness, insincerity,
   lip service, lying, mannerism, mealymouthedness, mendacity,
   mere show, mouthing, mummery, oiliness, ostentatious devotion,
   pecksniffery, pharisaicalness, pharisaism, pietism,
   pietisticalness, piety, piousness, pretense, pretension,
   prunes and prisms, public image, put-on, putting on airs, quackery,
   religionism, religiosity, sanctimoniousness, sanctimony,
   self-righteousness, sham, shiftiness, show, sneak attack,
   sneakiness, snivel, snuffle, snuffling, soft soap, stylishness,
   surreptitiousness, sweet talk, tokenism, treacherousness,
   two-facedness, unction, unctuousness, underhandedness,
   unnaturalness