containment vs restraint

containment and restraint both are nouns.

Word	Noun	Adjective	Verb	Adverb
containment	Yes	No	No	No
restraint	Yes	No	No	No

As nouns, restraint is a hypernym of containment; that is, restraint is a word with a broader meaning than containment:

containment (noun)	restraint (noun)
the act of containing; keeping something from spreading	the act of controlling by restraining someone or something
(physics) a system designed to prevent the accidental release of radioactive material from a reactor	a device that retards something's motion
a policy of creating strategic alliances in order to check the expansion of a hostile power or ideology or to force it to negotiate peacefully	discipline in personal and social activities
	lack of ornamentation
	a rule or condition that limits freedom
	the state of being physically constrained