emulator vs copycat

emulator and copycat both are nouns.

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

As nouns, emulator and copycat are synonyms defined as:

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

Other synonyms of emulator include ape, aper, imitator.

emulator (noun)	copycat (noun)
someone who copies the words or behavior of another	someone who copies the words or behavior of another