cramp vs fasten

cramp is a noun but fasten is not a noun.

Word	Noun	Adjective	Verb	Adverb
cramp	Yes	No	Yes	No
fasten	No	No	Yes	No

As verbs, fasten is a hypernym of cramp; that is, fasten is a word with a broader meaning than cramp:

Other hypernyms of cramp include fix, secure.

cramp (noun)	fasten (noun)
a strip of metal with ends bent at right angles; used to hold masonry together
a clamp for holding pieces of wood together while they are glued
a painful and involuntary muscular contraction

cramp (verb)	fasten (verb)
suffer from sudden painful contraction of a muscle	make tight or tighter
affect with or as if with a cramp	become fixed or fastened
prevent the progress or free movement of	cause to be firmly attached
secure with a cramp	attach to