nictation vs instinctive reflex

nictation and instinctive reflex both are nouns.

Word	Noun	Adjective	Verb	Adverb
nictation	Yes	No	No	No
instinctive reflex	Yes	No	No	No

As nouns, instinctive reflex is a hypernym of nictation; that is, instinctive reflex is a word with a broader meaning than nictation:

nictation: a reflex that closes and opens the eyes rapidly
instinctive reflex: an automatic instinctive unlearned reaction to a stimulus

nictation (noun)	instinctive reflex (noun)
a reflex that closes and opens the eyes rapidly	an automatic instinctive unlearned reaction to a stimulus