duplicator vs copier

duplicator and copier both are nouns.

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

As nouns, duplicator and copier are synonyms defined as:

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

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