vomitus vs excretion

vomitus and excretion both are nouns.

Word	Noun	Adjective	Verb	Adverb
vomitus	Yes	No	No	No
excretion	Yes	No	No	No

As nouns, excretion is a hypernym of vomitus; that is, excretion is a word with a broader meaning than vomitus:

vomitus: the matter ejected in vomiting
excretion: waste matter (as urine or sweat but especially feces) discharged from the body

Other hypernyms of vomitus include body waste, excrement, excreta, excretory product.

vomitus (noun)	excretion (noun)
the matter ejected in vomiting	the bodily process of discharging waste matter
	waste matter (as urine or sweat but especially feces) discharged from the body