Recuperation
Recuperation, return to health, rehabilitation, rallying, picking up, amelioration, upturn, comeback, renewal, convalescence, process of getting better, healing, improvement, betterment, rally, upswing, revival, and a turn for the better.
Retrieval
Retrieval, repossession, recapture, recouping, redemption, recoupment, regaining, getting back, reclamation, retaking, replevin, and recuperation.