ejection vs vomit

ejection and vomit both are nouns.

Word	Noun	Adjective	Verb	Adverb
ejection	Yes	No	No	No
vomit	Yes	No	Yes	No

As nouns, vomit is a hyponym of ejection; that is, vomit is a word with a more specific, narrower meaning than ejection:

ejection: the act of expelling or projecting or ejecting
vomit: the reflex act of ejecting the contents of the stomach through the mouth

ejection (noun)	vomit (noun)
the act of forcing out someone or something	the reflex act of ejecting the contents of the stomach through the mouth
the act of expelling or projecting or ejecting	a medicine that induces nausea and vomiting
	the matter ejected in vomiting

ejection (verb)	vomit (verb)
	eject the contents of the stomach through the mouth