Roneo vs duplicator

Roneo and duplicator both are nouns.

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

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

Roneo: 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 Roneo include copier.

Roneo (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