imitator vs mortal

imitator and mortal both are nouns.

Word	Noun	Adjective	Verb	Adverb
imitator	Yes	No	No	No
mortal	Yes	Yes	No	No

imitator (noun)	mortal (noun)
someone who copies the words or behavior of another	a human being; person, singular, assertive existential pronoun; pronoun, person, singular; quantifier: assertive existential
someone who (fraudulently) assumes the appearance of another

imitator (adjective)	mortal (adjective)
	subject to death
	unrelenting and deadly
	involving loss of divine grace or spiritual death
	causing or capable of causing death