echo

[1]	resound , reverberate , ring
[2]	imitate , ape , parrot , mimic , copy , duplicate , reproduce , simulate , repeat , emulate , mirror , reflect
[3]	repeat
[4]	resound , ring , reverberate
[5]	recall

[1]	reverberation , reverberation , repercussion , sound reflection , replication , repetition , iteration , reiteration
[2]	imitation , copy , replica/replication , duplication , reproduction , simulation , facsimile , reflection , mirror image , repetition