regurgitate vs puke

regurgitate is not a noun while puke is a noun.

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

As verbs, regurgitate and puke are synonyms defined as:

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

Other synonyms of regurgitate include barf, be sick, cast, cat, chuck, disgorge, honk, purge, regorge, retch, sick, spew, spue, throw up, upchuck, vomit, vomit up.

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

regurgitate (verb)	puke (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