RESOUND (5 letters) The term REPEAT SOUND can be solved by two crossword solutions, ECHO (4 letters) and RESOUND (5 letters). ECHO is a sound or a series of sounds that is reflected off a surface back to the listener. It is often used in literature and poetry to create a sense of atmosphere. RESOUND is a verb meaning to make a loud noise or to cause something to be heard again. It is often used to describe the reverberation of sound in an enclosed space.