puke vs regurgitate

puke is a noun but regurgitate is not a noun.

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

As verbs, puke and regurgitate are synonyms defined as:

puke and regurgitate: eject the contents of the stomach through the mouth

puke (noun)	regurgitate (noun)
a person who is deemed to be despicable or contemptible
the matter ejected in vomiting

puke (verb)	regurgitate (verb)
eject the contents of the stomach through the mouth	eject the contents of the stomach through the mouth
	repeat after memorization
	feed through the beak by regurgitating previously swallowed food
	pour or rush back