285 entries under decline topic. ×

2
discolor(verb, weaken, lessen, degenerate)
2
dry-rot(weaken, lessen, degenerate, deteriorate)
2
dwindle(verb, drop, settle, ease)
2
dwindling(noun, drop, decrease, depression)
2
frustration(noun, ruin, defeat, blow)
2
get worse(expression, weaken, lessen, degenerate)
2
give up the ghost(verb, expression, idiom, break, drop)
2
go bad(expression, idiom, weaken, lessen)
2
go downhill(verb, expression, drop, reduce)
2
go to seed(expression, idiom, weaken, lessen)
2
go to the dogs(expression, idiom, reduce, slip)
2
gravitate(verb, drop, settle, ease)
2
hit rock bottom(expression, idiom, weaken, lessen)
2
impairment(deterioration, degeneration)
2
mildew(weaken, lessen, degenerate, deteriorate)
2
misadventure(noun, ruin, defeat, slip)
2
mold(weaken, lessen, degenerate, deteriorate)
2
molder(break, beat, crush, split)
2
mortify(weaken, lessen, degenerate, deteriorate)
2
pass away(verb, expression, break, drop)
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APASmart Define. (2016). collapse thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/collapse/thesaurus/synonyms
ChicagoSmart Define. 2016. "collapse thesaurus" https://smartdefine.org/collapse/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, collapse thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/collapse/thesaurus/synonyms>.
MLASmart Define. "collapse thesaurus" 29 February 2016. Web. 23 September 2026. <https://smartdefine.org/collapse/thesaurus/synonyms>