mimeograph vs duplicator

mimeograph and duplicator both are nouns.

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

As nouns, duplicator is a hypernym of mimeograph; that is, duplicator is a word with a broader meaning than mimeograph:

mimeograph: a rotary duplicator that uses a stencil through which ink is pressed (trade mark Roneo)
duplicator: apparatus that makes copies of typed, written or drawn material

Other hypernyms of mimeograph include copier.

mimeograph (noun)	duplicator (noun)
a rotary duplicator that uses a stencil through which ink is pressed (trade mark Roneo)	apparatus that makes copies of typed, written or drawn material

mimeograph (verb)	duplicator (verb)
print copies from (a prepared stencil) using a mimeograph