wink vs restrain

wink is a noun but restrain is not a noun.

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

As verbs, restrain is a hypernym of wink; that is, restrain is a word with a broader meaning than wink:

Other hypernyms of wink include hold back, keep, keep back.

wink (noun)	restrain (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)

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