2
heighten(verb, hurt, damage, harm, bad action)
2
hinder(verb, adjective, stop, drop, decline)
2
imperfect(adjective, bad, low, deterioration)
2
injured(adjective, bad, low, deterioration)
2
kill(verb, release, weak, ruin, destroy)
2
lapse(noun, bad, develop, weak, damage)
2
lose ground(verb, bad, release, weak, back)
2
make something worse(expression, idiom, bad, awful, worse)
2
mangle(verb, help, bad, hurt, damage)
2
marescent(adjective, bad, low, deterioration)
2
minor(noun, adjective, bad, weak, damage)
2
on the decline(adjective, bad, low, deterioration)
2
on the wane(adjective, bad, low, deterioration)
2
out of repair(adjective, bad, low, deterioration)
2
out of tune(adjective, bad, low, deterioration)
2
passe(adjective, bad, low, deterioration)
2
pollute(verb, stop, drop, decline, clean)
2
prejudice(verb, bad, destroy, damage, harm)
2
quash(verb, press, influence, scare)
2
ravage(verb, bad, hurt, ruin, destroy)
10 years ago|4.8k views|share |citing 
APASmart Define. (2016). improve thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/improve/thesaurus/antonyms
ChicagoSmart Define. 2016. "improve thesaurus" https://smartdefine.org/improve/thesaurus/antonyms (accessed September 23, 2026).
HarvardSmart Define 2016, improve thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/improve/thesaurus/antonyms>.
MLASmart Define. "improve thesaurus" 29 March 2016. Web. 23 September 2026. <https://smartdefine.org/improve/thesaurus/antonyms>