puke vs excreta

puke and excreta both are nouns.

Word	Noun	Adjective	Verb	Adverb
puke	Yes	No	Yes	No
excreta	Yes	No	No	No

As nouns, excreta is a hypernym of puke; that is, excreta is a word with a broader meaning than puke:

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

Other hypernyms of puke include body waste, excrement, excretion, excretory product.

puke (noun)	excreta (noun)
a person who is deemed to be despicable or contemptible	waste matter (as urine or sweat but especially feces) discharged from the body
the matter ejected in vomiting

puke (verb)	excreta (verb)
eject the contents of the stomach through the mouth