vomit vs reflex action

vomit and reflex action both are nouns.

Word	Noun	Adjective	Verb	Adverb
vomit	Yes	No	Yes	No
reflex action	Yes	No	No	No

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

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

vomit (noun)	reflex action (noun)
the reflex act of ejecting the contents of the stomach through the mouth	an automatic instinctive unlearned reaction to a stimulus
a medicine that induces nausea and vomiting
the matter ejected in vomiting

vomit (verb)	reflex action (verb)
eject the contents of the stomach through the mouth