vomiting vs reflex response

vomiting and reflex response both are nouns.

Word	Noun	Adjective	Verb	Adverb
vomiting	Yes	No	No	No
reflex response	Yes	No	No	No

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

vomiting: the reflex act of ejecting the contents of the stomach through the mouth
reflex response: an automatic instinctive unlearned reaction to a stimulus

vomiting (noun)	reflex response (noun)
the reflex act of ejecting the contents of the stomach through the mouth	an automatic instinctive unlearned reaction to a stimulus