imposter vs role player

imposter and role player both are nouns.

Word	Noun	Adjective	Verb	Adverb
imposter	Yes	No	No	No
role player	Yes	No	No	No

As nouns, imposter and role player are synonyms defined as:

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

imposter (noun)	role player (noun)
a person who makes deceitful pretenses	a theatrical performer
	a person who makes deceitful pretenses