echo vs reverberation

echo and reverberation both are nouns.

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

As nouns, echo and reverberation are synonyms defined as:

echo and reverberation: the repetition of a sound resulting from reflection of the sound waves

Other synonyms of echo include replication, sound reflection.

echo (noun)	reverberation (noun)
an imitation or repetition	the repetition of a sound resulting from reflection of the sound waves
the repetition of a sound resulting from reflection of the sound waves	a remote or indirect consequence of some action
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