50 entries under fester topic. ×

13
spoil(noun, verb, dull, change, decline)
10
turn(noun, verb, change, decline, spoil)
7
decay(verb, dull, spoil, deteriorate, taint)
4
go bad(verb, expression, dull, decline, turn)
4
putrefy(verb, dull, decline, spoil, weaken)
4
rot(verb, dull, decline, spoil, weaken)
3
break up(verb, expression, phrasal verb, decline, weaken)
3
decompose(verb, dull, decline, spoil, weaken)
2
be impaired(verb, decline, weaken, lessen, degenerate)
2
become contaminated(expression, decline, weaken, lessen, degenerate)
2
blight(verb, decline, weaken, lessen, degenerate)
2
collapse(verb, decline, weaken, lessen, degenerate)
2
corrode(verb, decline, pain, weaken, lessen)
2
crumble(verb, dull, decline, spoil, weaken)
2
decline(verb, weaken, lessen, degenerate, deteriorate)
2
defile(verb, decline, weaken, lessen, degenerate)
2
degenerate(verb, decline, weaken, lessen, deteriorate)
2
depreciate(verb, decline, weaken, lessen, degenerate)
2
deteriorate(verb, decline, weaken, lessen, degenerate)
2
discolor(verb, decline, weaken, lessen, degenerate)
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APASmart Define. (2015). curdle thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/curdle/thesaurus/synonyms
ChicagoSmart Define. 2015. "curdle thesaurus" https://smartdefine.org/curdle/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, curdle thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/curdle/thesaurus/synonyms>.
MLASmart Define. "curdle thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/curdle/thesaurus/synonyms>