WordNet (r) 3.0 (2006):

bounce back
    v 1: improve in health; "He got well fast" [syn: get well,
         get over, bounce back] [ant: get worse, relapse]

Moby Thesaurus II by Grady Ward, 1.0:

54 Moby Thesaurus words for "bounce back":
   backfire, backlash, be reflected, be sent back, boom, boomerang,
   bounce, bound, bound back, cannon, cannon off, carom, come around,
   come back, come round, come to, come up smiling, echo, echo back,
   fly back, get about, get over, get well, have repercussions, kick,
   kick back, lash back, make a comeback, pull round, pull through,
   rally, rebound, recalcitrate, recoil, recover, reecho, reflect,
   repercuss, resile, resound, return, reverberate, revive, ricochet,
   roll, rumble, send back, snap back, sound, spring, spring back,
   strong arm, survive, weather the storm