a person who pretends to have virtues, moral or religious beliefs, principles, etc., that he or she does not actually possess, esp. a person whose actions belie stated beliefs.

a person who feigns some desirable or publicly approved attitude, esp. one whose private life, opinions, or statements belie his or her public statements.

adjective

actual , authentic , forthright , honest , just , real , reliable , righteous , sincere , truthful , upright , ingenuous , undissembling , unfeigned

adjective

affected , artificial , assuming , bland , canting , captious , caviling , deceptive , deluding , dissembling , double , double-dealing , duplicitous , faithless , false , feigning , fishy * , fraudulent , glib , hollow , insincere , jivey , left-handed , lying , moralistic , oily , pharisaical , phony , pietistic , pious , sanctimonious , self-righteous , smooth , smooth-spoken , smooth-tongued , snide , specious , spurious , two-faced * , unctuous , unnatural , unreliable , pecksniffian , pharisaic , two-faced , bigoted , deceitful , dishonest , pretending