copier vs duplicator

copier and duplicator both are nouns.

Word	Noun	Adjective	Verb	Adverb
copier	Yes	No	No	No
duplicator	Yes	No	No	No

As nouns, copier and duplicator are synonyms defined as:

copier and duplicator: apparatus that makes copies of typed, written or drawn material

copier (noun)	duplicator (noun)
apparatus that makes copies of typed, written or drawn material	apparatus that makes copies of typed, written or drawn material