regurgitate vs echo

regurgitate is not a noun while echo is a noun.

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

As verbs, echo is a hypernym of regurgitate; that is, echo is a word with a broader meaning than regurgitate:

Other hypernyms of regurgitate include repeat.

regurgitate (noun)	echo (noun)
	an imitation or repetition
	the repetition of a sound resulting from reflection of the sound waves
	a reflected television or radio or radar beam
	a close parallel of a feeling, idea, style, etc.
	a reply that repeats what has just been said

regurgitate (verb)	echo (verb)
eject the contents of the stomach through the mouth	to say again or imitate
repeat after memorization	ring or echo with sound
feed through the beak by regurgitating previously swallowed food	bring to mind
pour or rush back