facial gesture vs wink

facial gesture and wink both are nouns.

Word	Noun	Adjective	Verb	Adverb
facial gesture	Yes	No	No	No
wink	Yes	No	Yes	No

As nouns, wink is a hyponym of facial gesture; that is, wink is a word with a more specific, narrower meaning than facial gesture:

Other hyponyms of facial gesture include emoticon, gape, face, grimace, frown, scowl, grin, grinning, smile, smiling, laugh, snarl, straight face, wince.

facial gesture (noun)	wink (noun)
a gesture executed with the facial muscles	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)

facial gesture (verb)	wink (verb)
	briefly shut the eyes
	keep back by blinking
	signal by winking
	gleam or glow intermittently