emulator vs imitator

emulator and imitator both are nouns.

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

As nouns, emulator and imitator are synonyms defined as:

emulator and imitator: someone who copies the words or behavior of another

Other synonyms of emulator include ape, aper, copycat.

emulator (noun)	imitator (noun)
someone who copies the words or behavior of another	someone who copies the words or behavior of another
	someone who (fraudulently) assumes the appearance of another