flicker vs wink

flicker and wink both are nouns.

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

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

Other hypernyms of flicker include blink, flash, twinkle, winkle.

flicker (noun)	wink (noun)
the act of moving back and forth	a reflex that closes and opens the eyes rapidly
North American woodpecker	closing one eye quickly as a signal
a momentary flash of light	a very short time (as the time it takes the eye to blink or the heart to beat)

flicker (verb)	wink (verb)
move back and forth very rapidly	briefly shut the eyes
flash intermittently	keep back by blinking
shine unsteadily	signal by winking
	gleam or glow intermittently