What is Echo ?
Echo is (noun) a sound which is repeated (as when you shout in a place such as a cave) We could hear the echo of voices in the tunnel. If you go to the Whispering Gallery in the dome of St Paul’s Cathedral you can hear the echo very clearly. (NOTE: The plural is echoes.) (verb) 1. (of sound.) to make an echo Their voices echoed down the tunnel. 2. to repeat The newspaper article echoed the opinions put forward in the minister’s speech. eclair (noun) a long light cake filled with cream and with chocolate on top
source: Easier English, Student Dictionary Upper Intermediate Level