palpebration vs eye blink

palpebration and eye blink both are nouns.

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

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

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

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

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