parrot vs imitator

parrot and imitator both are nouns.

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

As nouns, imitator is a hypernym of parrot; that is, imitator is a word with a broader meaning than parrot:

Other hypernyms of parrot include ape, aper, copycat, emulator.

parrot (noun)	imitator (noun)
usually brightly colored zygodactyl tropical birds with short hooked beaks and the ability to mimic sounds	someone who copies the words or behavior of another
a copycat who does not understand the words or acts being imitated	someone who (fraudulently) assumes the appearance of another

parrot (verb)	imitator (verb)
repeat mindlessly