325 entries under decline topic. ×

8
fail(verb, stop, drop, end)
8
fester(verb, idle, stall, inflamed)
8
mess(noun, disorder, ruin, defeat)
8
putrescence(noun, collapse, condition, down)
8
ruination(noun, disorder, confusion, collapse)
7
consumption(noun, disease, use, collapse)
7
corrode(verb, hurt, reduce, destroy)
7
corrosion(noun, drop, ruin, collapse)
7
corrupt(verb, hurt, reduce, destroy)
7
decrepitude(noun, drop, disorder, ruin)
7
languish(verb, drop, fall, fail)
7
mortification(noun, collapse, down, deterioration)
7
slump(noun, verb, drop, cut)
7
waste away(verb, expression, phrasal verb, dry)
7
weakening(noun, drop, fall, decrease)
7
worsen(verb, break, drop, reduce)
6
breakdown(noun, verb, break, ruin)
6
contract(verb, drop, cut, reduce)
6
degradation(noun, fall, evil, corruption)
6
gangrene(noun, ruin, decrease, collapse)
10 years ago|22k views|share |citing 
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>