WordNet sense 1 (the backward jerk of a gun when it is fired):

kick

WordNet sense 2 (a movement back from an impact):

backlash, rebound, repercussion, rebound

WordNet sense 3 (come back to the originator of an action with an undesired effect):

backfire

WordNet sense 4 (draw back, as with fear or pain):

cringe, flinch, funk, quail, shrink, wince, squinch

WordNet sense 5 (spring back; spring away from an impact):

bounce, bound, resile, reverberate, ricochet, spring, take a hop

WordNet sense 6 (spring back, as from a forceful thrust):

kick back