fastening vs constraint

fastening and constraint both are nouns.

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

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

Other hypernyms of fastening include restraint.

fastening (noun)	constraint (noun)
the act of fastening things together	the act of constraining; the threat or use of force to control the thoughts or behavior of others
restraint that attaches to something or holds something in place	a device that retards something's motion
	the state of being physically constrained