restraint vs restrain

restraint is a noun but restrain is not a noun.

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

restraint (noun)	restrain (noun)
the act of controlling by restraining someone or something
a device that retards something's motion
discipline in personal and social activities
lack of ornamentation
a rule or condition that limits freedom
the state of being physically constrained

restraint (verb)	restrain (verb)
	prevent the action or expression of
	to close within bounds, or otherwise limit or deprive of free movement
	restrict (someone or something) so as to make free movement difficult
	prevent (someone or something) from doing something