gulping vs instinctive reflex

gulping and instinctive reflex both are nouns.

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

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

gulping: a spasmodic reflex of the throat made as if in swallowing
instinctive reflex: an automatic instinctive unlearned reaction to a stimulus

gulping (noun)	instinctive reflex (noun)
the drinking of large mouthfuls rapidly	an automatic instinctive unlearned reaction to a stimulus
a spasmodic reflex of the throat made as if in swallowing