dissimulation

from WordNet (r) 3.0 (2006)

dissimulation
    n 1: the act of deceiving [syn: {deception}, {deceit},
         {dissembling}, {dissimulation}]

from The Collaborative International Dictionary of English v.0.48

dissimulation \dis*sim`u*la"tion\, n. [L. dissimulatio: cf. F.
   dissimulation.]
   The act of dissembling; a hiding under a false appearance;
   concealment by feigning; false pretension; hypocrisy.
   [1913 Webster]

         Let love be without dissimulation.       --Rom. xii. 9.
   [1913 Webster]

         Dissimulation . . . when a man lets fall signs and
         arguments that he is not that he is.     --Bacon.
   [1913 Webster]

         Simulation is a pretense of what is not, and
         dissimulation a concealment of what is.  --Tatler.
   [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

26 Moby Thesaurus words for "dissimulation":
      Tartuffe, cloaking, concealing, cunning, deceit, deception,
      dissemblance, dissembler, dissembling, dissimulator,
      double-dealing, duplicity, feigning, guile, hiding, hypocrisy,
      lip server, masking, misrepresentation, pharisaism, pharisee,
      pretense, sanctimony, secreting, sham, whited sepulcher