zip fastener vs zipper

zip fastener and zipper both are nouns.

Word	Noun	Adjective	Verb	Adverb
zip fastener	Yes	No	No	No
zipper	Yes	No	Yes	No

As nouns, zip fastener and zipper are synonyms defined as:

zip fastener and zipper: a fastener for locking together two toothed edges by means of a sliding tab

Other synonyms of zip fastener include slide fastener, zip.

zip fastener (noun)	zipper (noun)
a fastener for locking together two toothed edges by means of a sliding tab	a fastener for locking together two toothed edges by means of a sliding tab

zip fastener (verb)	zipper (verb)
	close with a zipper