3
debauch(verb, help, bad, hurt, damage)
3
decay(verb, break, change, quality, bad)
3
decrease(noun, verb, stop, drop, decline)
3
degenerate(verb, health, quality, bad, low)
3
demoralize(verb, hurt, damage, harm, clean)
3
devastate(verb, health, help, plan, destroy)
3
disimprove(verb, health, quality, bad, hurt)
3
dwindle(verb, health, quality, bad, increase)
3
endamage(verb, bad, damage, harm, regress)
3
escalate(verb, hurt, damage, harm, bad action)
3
exasperate(verb, bad, damage, harm, get worse)
3
reduce(verb, stop, drop, fix, decline)
3
regress(noun, verb, hurt, damage, progress)
3
retrogress(verb, health, stop, drop, quality)
3
sink(verb, health, develop, plan, harm)
3
stale(adjective, bad, low, deterioration)
3
taint(verb, break, change, fix, bad)
3
vanquish(verb, press, influence, scare)
3
water(noun, bad, weak, damage, awful)
2
ruin(verb, stop, drop, bad, decline)
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>