nictitation vs nictation

nictitation and nictation both are nouns.

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

As nouns, nictitation and nictation are synonyms defined as:

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

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

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