Synonyms for improvement

noun

1. The process of making or becoming better

   betterment, amelioration, melioration, rectification, change, amendment, alteration, reformation, progression, advance, advancement, development, refinement, growth, rise, reclamation, civilization, gain, cultivation, progressiveness, increase, enrichment, promotion, recovery, recuperation, healing, regeneration, furtherance, renovation, modernization, remodeling, refurbishment, repair, reorganization, reform, emendation, revision, elaboration, enhancement, elevation, preferment, ennoblement, shaking down*, getting the bugs out*; see also revision.

   Antonyms decay*, deterioration, retrogression.

2. That which has been improved

   addition, supplement, repair, extra, attachment, correction, reform, remodeling, modernization, betterment, refinement, luxury, advance, advancement, step forward, enhancement, new model, deluxe model, latest thing*, last word*; see also change 2.