brake shoe vs constraint

brake shoe and constraint both are nouns.

Word	Noun	Adjective	Verb	Adverb
brake shoe	Yes	No	No	No
constraint	Yes	No	No	No

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

brake shoe: a restraint provided when the brake linings are moved hydraulically against the brake drum to retard the wheel's rotation
constraint: a device that retards something's motion

Other hypernyms of brake shoe include restraint.

brake shoe (noun)	constraint (noun)
a restraint provided when the brake linings are moved hydraulically against the brake drum to retard the wheel's rotation	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