resound vs echo

resound is not a noun while echo is a noun.

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

As verbs, resound and echo are synonyms defined as:

Other synonyms of resound include reverberate, ring.

resound (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