paper fastener vs fastener

paper fastener and fastener both are nouns.

Word	Noun	Adjective	Verb	Adverb
paper fastener	Yes	No	No	No
fastener	Yes	No	No	No

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

Other hypernyms of paper fastener include fastening, fixing, holdfast.

paper fastener (noun)	fastener (noun)
a fastener for holding a sheet of paper in place	restraint that attaches to something or holds something in place
	a person who fastens or makes fast