mortal vs imitator

mortal and imitator both are nouns.

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

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

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