yawn vs innate reflex

yawn and innate reflex both are nouns.

Word	Noun	Adjective	Verb	Adverb
yawn	Yes	No	Yes	No
innate reflex	Yes	No	No	No

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

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

yawn (noun)	innate 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

yawn (verb)	innate reflex (verb)
utter a yawn, as from lack of oxygen or when one is tired
be wide open