2
worsening(noun, adjective, stop, deterioration)
1
disadvantage
1
harm(noun, stop, deterioration)
1
collapse
1
comedown(rise, boost)
1
corrosion
1
crash
1
decadence(rise, decency)
1
defect(noun, good, right, benefit, blemish)
1
degenerate
1
detriment
1
diminishment(noun, stop, deterioration)
1
dip
1
dive
1
downfall
1
downturn
1
ebb(noun, flow)
1
ebbing
1
failure(noun, stop, increase, rise, deterioration)
1
fall
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APASmart Define. (2015). improvement thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/improvement/thesaurus/antonyms
ChicagoSmart Define. 2015. "improvement thesaurus" https://smartdefine.org/improvement/thesaurus/antonyms (accessed September 24, 2026).
HarvardSmart Define 2015, improvement thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/improvement/thesaurus/antonyms>.
MLASmart Define. "improvement thesaurus" 22 December 2015. Web. 24 September 2026. <https://smartdefine.org/improvement/thesaurus/antonyms>