pretender in WordNet English dictionary

1. a person who professes beliefs and opinions that he or she does not hold in order to conceal his or her real feelings or motives
   hypocrite  dissembler  dissimulator  phony  phoney  pretender 
   
2. a person who makes deceitful pretenses
   imposter  impostor  pretender  fake  faker  fraud  sham  shammer  pseudo  pseud  role player