(n.) The act of reinstating; the state of being reinstated; reestablishment.

about-face backing backsliding clearance clearing destigmatization destigmatizing disenchantment exculpation explanation flip-flop improvement instauration justification lapse purgation purging rationalization reactivation recidivation recidivism reclamation reconstitution reconversion redintegration reenactment reestablishment reformation regress regression rehabilitation reinstation reinstitution reinvestiture reinvestment relapse replacement restitution restoration retrocession retrogradation retrogression retroversion return returning reversal reverse reversion reverting revulsion slipping back turn turnabout vindication