the act of amending or the state of being amended.

an alteration of or addition to a motion, bill, constitution, etc.

a change made by correction, addition, or deletion

The editors made few amendments to the manuscript.

Horticulture . a soil-conditioning substance that promotes plant growth indirectly by improving such soil qualities as porosity, moisture retention, and pH balance.

noun

worsening

noun

alteration , amelioration , betterment , change , correction , enhancement , improvement , mending , modification , rectification , reform , reformation , remedy , repair , revision , act , addendum , adjunct , attachment , bill , clarification , clause , codicil , measure , motion , rider , suggestion , supplement , melioration , upgrade , emendation , rewrite