325 entries under decline topic. ×

6
lapse(noun, verb, stop, drop, end)
6
shrivel(verb, drop, cut, reduce)
6
spoilage(noun, collapse, condition, down)
5
adulteration(noun, drop, harm, collapse)
5
break(verb, fail, lower, collapse)
5
declination(noun, drop, return, collapse)
5
degeneracy(noun, drop, fall, wrong)
5
erode(verb, hurt, reduce, destroy)
5
fading(noun, collapse, down, deterioration)
5
go downhill(verb, expression, idiom, stop, drop)
5
go to pot(verb, expression, idiom, drop)
5
go to seed(verb, expression, idiom, fail)
5
lessen(verb, drop, cut, reduce)
5
putridness(noun, collapse, condition, down)
5
regress(verb, reduce, weaken, lapse)
5
rotting(noun, drop, ruin, decrease)
5
stagnate(verb, weaken, idle, deteriorate)
4
caries(noun, ruin, decrease, collapse)
4
consume(verb, hurt, reduce, destroy)
4
crumbling(noun, drop, ruin, collapse)
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APASmart Define. (2016). decay thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/decay/thesaurus/synonyms
ChicagoSmart Define. 2016. "decay thesaurus" https://smartdefine.org/decay/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, decay thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/decay/thesaurus/synonyms>.
MLASmart Define. "decay thesaurus" 14 March 2016. Web. 24 September 2026. <https://smartdefine.org/decay/thesaurus/synonyms>