gesticulate vs wink

gesticulate is not a noun while wink is a noun.

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

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

gesticulate (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)

gesticulate (verb)	wink (verb)
show, express or direct through movement	briefly shut the eyes
	keep back by blinking
	signal by winking
	gleam or glow intermittently