nictation vs nictitation

nictation and nictitation both are nouns.

Word	Noun	Adjective	Verb	Adverb
nictation	Yes	No	No	No
nictitation	Yes	No	No	No

As nouns, nictation and nictitation are synonyms defined as:

nictation and nictitation: a reflex that closes and opens the eyes rapidly

Other synonyms of nictation include blink, blinking, eye blink, wink, winking.

nictation (noun)	nictitation (noun)
a reflex that closes and opens the eyes rapidly	a reflex that closes and opens the eyes rapidly