IMPROVE Synonyms: 57 Similar and Opposite Words - Merriam-Webster
https://www.merriam-webster.com/thesaurus/improve
WebSynonyms for IMPROVE: enhance, help, better, refine, amend, remedy, upgrade, remediate; Antonyms of IMPROVE: worsen, impair, hurt, harm, damage, injure, reduce, spoil.
DA: 82 PA: 34 MOZ Rank: 60