The crossword solution for the term 'REBOUND, LIKE SOUND' is ECHO, which is a four letter word. ECHO is a phenomenon caused by the reflection of sound waves off a surface back to the listener. It is commonly heard in nature, such as in a valley or canyon, and can also be artificially created in a recording studio. The term 'ECHO' is also used to describe a repetition of sound, such as a person's voice echoing off a wall.