blink of an eye vs wink

blink of an eye and wink both are nouns.

Word	Noun	Adjective	Verb	Adverb
blink of an eye	Yes	No	No	No
wink	Yes	No	Yes	No

As nouns, blink of an eye and wink are synonyms defined as:

blink of an eye and wink: a very short time (as the time it takes the eye to blink or the heart to beat)

Other synonyms of blink of an eye include flash, heartbeat, instant, jiffy, New York minute, split second, trice, twinkling.

blink of an eye (noun)	wink (noun)
a very short time (as the time it takes the eye to blink or the heart to beat)	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)

blink of an eye (verb)	wink (verb)
	briefly shut the eyes
	keep back by blinking
	signal by winking
	gleam or glow intermittently