Amelioration

Etymology
Latin melior

Noun

 * 1) The act of making better
 * 2) an improvement

Thesaurus
Great Leap Forward; about-face; accommodation; adaptation; adjustment; advance; advancement; alteration; amendment; apostasy; ascent; bettering; betterment; boost; break; change; change of heart; changeableness; constructive change; continuity; conversion; defection; degeneration; degenerative change; deterioration; deviation; difference; discontinuity; divergence; diversification; diversion; diversity; enhancement; enrichment; eugenics; euthenics; fitting; flip-flop; furtherance; gradual change; headway; improvement; lift; melioration; mend; mending; mitigation; modification; modulation; overthrow; pickup; preferment; progress; progression; promotion; qualification; radical change; re-creation; realignment; recovery; redesign; reform; reformation; remaking; renewal; reshaping; restoration; restructuring; reversal; revival; revivification; revolution; rise; shift; sudden change; switch; total change; transition; turn; turnabout; upbeat; upheaval; uplift; upping; upswing; uptrend; upward mobility; variation; variety; violent change; worsening