safety harness vs constraint

safety harness and constraint both are nouns.

Word	Noun	Adjective	Verb	Adverb
safety harness	Yes	No	No	No
constraint	Yes	No	No	No

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

safety harness: belt attaching you to some object as a restraint in order to prevent you from getting hurt
constraint: a device that retards something's motion

Other hypernyms of safety harness include belt, restraint.

safety harness (noun)	constraint (noun)
belt attaching you to some object as a restraint in order to prevent you from getting hurt	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