holdfast vs constraint

holdfast and constraint both are nouns.

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

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

Other hypernyms of holdfast include restraint.

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