regurgitation vs regurgitate

regurgitation is a noun but regurgitate is not a noun.

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

regurgitation (noun)	regurgitate (noun)
the reflex act of ejecting the contents of the stomach through the mouth
recall after rote memorization
backflow of blood through a defective heart valve

regurgitation (verb)	regurgitate (verb)
	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