onionskin vs typewriter paper

onionskin and typewriter paper both are nouns.

Word	Noun	Adjective	Verb	Adverb
onionskin	Yes	No	No	No
typewriter paper	Yes	No	No	No

As nouns, typewriter paper is a hypernym of onionskin; that is, typewriter paper is a word with a broader meaning than onionskin:

onionskin: a thin strong lightweight translucent paper used especially for making carbon copies
typewriter paper: writing paper suitable for use in a typewriter

Other hypernyms of onionskin include typing paper.

onionskin (noun)	typewriter paper (noun)
a thin strong lightweight translucent paper used especially for making carbon copies	writing paper suitable for use in a typewriter