blink vs palpebration

blink and palpebration both are nouns.

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

As nouns, palpebration is a hyponym of blink; that is, palpebration is a word with a more specific, narrower meaning than blink:

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

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

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