impostor
nounOne who engages in deception under an assumed name or identity.
nounOne who imposes on others; a person who practises deception, usually under a false guise or an assumed character.
nounOne who imposes upon others; a person who assumes a character or title not his own, for the purpose of deception; a pretender.
nounSomeone who attempts to
a person who makes deceitful pretenses