The term COME BACK can be expressed in a variety of ways, such as RECUR (5 letters), ECHO (4 letters), REBOUND (7 letters), RETURN (6 letters), REAPPEAR (8 letters), RESURGE (7 letters), REPLY (5 letters), RECALL (6 letters), RETORT (6 letters), YALL (4 letters), ANSWER (6 letters), REVERT (6 letters), and RESPOND (7 letters). These words all refer to the idea of coming back or returning in some way, whether it is through a physical action, a sound, or a response.