fake vs impostor

fake and impostor both are nouns.

Word	Noun	Adjective	Verb	Adverb
fake	Yes	Yes	Yes	No
impostor	Yes	No	No	No

As nouns, fake and impostor are synonyms defined as:

Other synonyms of fake include faker, fraud, imposter, pretender, pseud, pseudo, role player, sham, shammer.

fake (noun)	impostor (noun)
(football) a deceptive move made by a football player	a person who makes deceitful pretenses
something that is a counterfeit; not what it seems to be
a person who makes deceitful pretenses

fake (adjective)	impostor (adjective)
not genuine or real; being an imitation of the genuine article
fraudulent; having a misleading appearance

fake (verb)	impostor (verb)
speak insincerely or without regard for facts or truths
make a copy of with the intent to deceive
tamper, with the purpose of deception