The term 'spring back' can be defined by five different crossword solutions: REBOUND (7 letters), RECOIL (6 letters), BOUNCE (6 letters), RICOCHET (8 letters), and RESILE (6 letters). REBOUND means to spring back after hitting a surface, RECOIL means to move back suddenly in response to a stimulus, BOUNCE means to spring back after hitting a surface, RICOCHET means to REBOUND off a surface at an angle, and RESILE means to return to a former position or state. All of these words describe the action of springing back after being acted upon by an external force.