50 entries under deteriorate topic. ×

1
fade(verb, decline, weaken, degenerate)
1
fail(verb, decline, weaken, degenerate)
1
flag(verb, decline, weaken, degenerate)
1
go downhill(verb, expression, decline, fail, lower)
1
go to pot(verb, expression, idiom, decline, fail)
1
go to the dogs(verb, expression, idiom, decline, fail)
1
hit the skids(verb, expression, idiom, decline, fail)
1
impair(verb, decline, weaken, degenerate)
1
injure(verb, decline, weaken, degenerate)
1
languish(verb, decline, weaken, degenerate)
1
lapse(verb, decline, weaken, degenerate)
1
lessen(verb, decline, weaken, degenerate)
1
lose it(verb, expression, phrasal verb, decline, fail)
1
lose quality(verb, expression, decline, fail, lower)
1
lower(verb, decline, weaken, degenerate)
1
mar(verb, decline, weaken, degenerate)
1
pervert(verb, decline, weaken, degenerate)
1
regress(verb, decline, weaken, degenerate)
1
retrograde(verb, decline, weaken, degenerate)
1
retrogress(verb, decline, weaken, degenerate)
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APASmart Define. (2015). become worse thesaurus. Retrieved October 1, 2026, from https://smartdefine.org/become_worse/thesaurus/synonyms
ChicagoSmart Define. 2015. "become worse thesaurus" https://smartdefine.org/become_worse/thesaurus/synonyms (accessed October 1, 2026).
HarvardSmart Define 2015, become worse thesaurus, Smart Define, viewed 1 October, 2026, <https://smartdefine.org/become_worse/thesaurus/synonyms>.
MLASmart Define. "become worse thesaurus" 10 April 2015. Web. 1 October 2026. <https://smartdefine.org/become_worse/thesaurus/synonyms>