cage vs constraint

cage and constraint both are nouns.

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

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

Other hypernyms of cage include restraint.

cage (noun)	constraint (noun)
an enclosure made or wire or metal bars in which birds or animals can be kept	the act of constraining; the threat or use of force to control the thoughts or behavior of others
the net that is the goal in ice hockey	a device that retards something's motion
a movable screen placed behind home base to catch balls during batting practice	the state of being physically constrained
something that restricts freedom as a cage restricts movement

cage (verb)	constraint (verb)
confine in a cage