Synonyms for Pretender (same or very similar meaning)
WordNet sense 1 (a person who makes deceitful pretenses):
fake, faker, fraud, imposter, impostor, pseudo, sham, pseud, shammer, role playerWordNet sense 2 (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):
dissembler, dissimulator, hypocrite, phoney, phonyFrom the ODE community, based on WordNetadd/edit