person vs copycat

person and copycat both are nouns.

Word	Noun	Adjective	Verb	Adverb
person	Yes	No	No	No
copycat	Yes	No	No	No

person (noun)	copycat (noun)
a human being; person, singular, assertive existential pronoun; pronoun, person, singular; quantifier: assertive existential	someone who copies the words or behavior of another
a human body (usually including the clothing)
a grammatical category used in the classification of pronouns, possessive determiners, and verb forms according to whether they indicate the speaker, the addressee, or a third party