restrain vs restraint

restrain is not a noun while restraint is a noun.

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

restrain (noun)	restraint (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

restrain (verb)	restraint (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