fastening vs restraint

fastening and restraint both are nouns.

Word	Noun	Adjective	Verb	Adverb
fastening	Yes	No	No	No
restraint	Yes	No	No	No

As nouns, restraint is a hypernym of fastening; that is, restraint is a word with a broader meaning than fastening:

Other hypernyms of fastening include constraint.

fastening (noun)	restraint (noun)
the act of fastening things together	the act of controlling by restraining someone or something
restraint that attaches to something or holds something in place	a device that retards something's motion
	discipline in personal and social activities
	lack of ornamentation
	a rule or condition that limits freedom
	the state of being physically constrained