locker vs fastener

locker and fastener both are nouns.

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

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

Other hypernyms of locker include fastening, fixing, holdfast.

locker (noun)	fastener (noun)
a storage compartment for clothes and valuables; usually it has a lock	restraint that attaches to something or holds something in place
a trunk for storing personal possessions; usually kept at the foot of a bed (as in a barracks)	a person who fastens or makes fast
a fastener that locks or closes