recrudescence (n.)

• amendment
• atavism
• improvement
• lapse
• palingenesis
• rebirth
• reclamation
• recurrence
• redemption
• reform
• reformation
• refreshment
• regeneration
• regression
• rejuvenation
• relapse
• renaissance
• renascence
• renewal
• resurgence
• resurrection
• resuscitation
• return
• reversal
• reverse
• reversion
• revival
• revivification
• setback
• throwback