Synonyms|963Antonyms|275|Broader|26Narrower|89Related|658
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compress
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condense
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confiscation
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contraction
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cutback
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dampen
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deaden
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deadlock
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debilitation
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decaying
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declivity
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decomposition(noun, rot, breakdown)
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decrement
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decry
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defacement
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defer
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deflate
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deflation(boost, win)
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deformity
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degrade
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ChicagoSmart Define. 2015. "improvement thesaurus" https://smartdefine.org/improvement/thesaurus/antonyms (accessed September 25, 2026).
HarvardSmart Define 2015, improvement thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/improvement/thesaurus/antonyms>.
MLASmart Define. "improvement thesaurus" 22 December 2015. Web. 25 September 2026. <https://smartdefine.org/improvement/thesaurus/antonyms>