[1] : The Collaborative International Dictionary of English v.0.48

dissembler \dissem"bler\, n.
   one who dissembles; one who conceals his opinions or
   dispositions under a false appearance; a hypocrite.
   1913 webster

         it is the weakest sort of politicians that are the
         greatest dissemblers.                    --bacon.
   1913 webster

         priests, princes, women, no dissemblers here. --pope.

   syn: dissembler, hypocrite.

   usage: a person is called a dissembler with reference to his
          concealment of his real character, and a hypocrite
          with reference to his assumption of a false character.
          but hypocrite is the stronger word, being commonly
          used to characterize a person who is habitually
          insincere and false, especially one who makes
          professions of goodness when his aims are selfish and
          his life corrupt.
          1913 webster
see also:
dissembler hypocrite 

[2] : WordNet (r) 2.0

dissembler
     n : a person who professes beliefs and opinions that he does not
         hold syn: hypocrite, phony, phoney, pretender
see also:
hypocrite phony phoney pretender 

Dissembler >> D Words
Dissembler, definition of term: Dissembler
dissembler_pag1.html