WordNet sense 1 (rebounding from an impact (or series of impacts)):

bouncing

WordNet sense 2 (the quality of a substance that is able to rebound):

bounciness

WordNet sense 3 (move up and down repeatedly):

jounce

WordNet sense 4 (spring back; spring away from an impact):

bound, rebound, recoil, resile, reverberate, ricochet, spring, rebound, recoil, take a hop

WordNet sense 5 (a light, self-propelled movement upwards or forwards):

leap, leaping, saltation