restrain vs wink

restrain is not a noun while wink is a noun.

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

As verbs, wink is a hyponym of restrain; that is, wink is a word with a more specific, narrower meaning than restrain:

restrain (noun)	wink (noun)
	a reflex that closes and opens the eyes rapidly
	closing one eye quickly as a signal
	a very short time (as the time it takes the eye to blink or the heart to beat)

restrain (verb)	wink (verb)
prevent the action or expression of	briefly shut the eyes
to close within bounds, or otherwise limit or deprive of free movement	keep back by blinking
restrict (someone or something) so as to make free movement difficult	signal by winking
prevent (someone or something) from doing something	gleam or glow intermittently