pretender

Noun

• 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

• a person who makes deceitful pretenses

• a claimant to the throne or to the office of ruler (usually without just title)

Related words

• Synonyms: 
  hypocrite , dissembler , dissimulator , phony , phoney , Pretender