palpebration vs blink

palpebration and blink both are nouns.

Word	Noun	Adjective	Verb	Adverb
palpebration	Yes	No	No	No
blink	Yes	No	Yes	No

As nouns, blink is a hypernym of palpebration; that is, blink is a word with a broader meaning than palpebration:

palpebration: repeated blinking or winking (especially if uncontrolled and persistent)
blink: a reflex that closes and opens the eyes rapidly

Other hypernyms of palpebration include blinking, eye blink, nictation, nictitation, wink, winking.

palpebration (noun)	blink (noun)
repeated blinking or winking (especially if uncontrolled and persistent)	a reflex that closes and opens the eyes rapidly

palpebration (verb)	blink (verb)
	briefly shut the eyes
	keep back by blinking
	gleam or glow intermittently