oscitancy vs inborn reflex

oscitancy and inborn reflex both are nouns.

Word	Noun	Adjective	Verb	Adverb
oscitancy	Yes	No	No	No
inborn reflex	Yes	No	No	No

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

oscitancy: an involuntary intake of breath through a wide open mouth; usually triggered by fatigue or boredom
inborn reflex: an automatic instinctive unlearned reaction to a stimulus

oscitancy (noun)	inborn reflex (noun)
an involuntary intake of breath through a wide open mouth; usually triggered by fatigue or boredom	an automatic instinctive unlearned reaction to a stimulus
drowsiness and dullness manifested by yawning