1
degeneracy(noun, drop, decline, fall, failure)
1
degenerate
1
degradation
1
deliquescent
1
depreciating(adjective, declining, shrinking, lowering, falling)
1
depreciation(noun, drop, decline, decrease, retreat)
1
devolution(noun, drop, fall, decrease, failure)
1
die down(verb, expression, phrasal verb)
1
dilapidating(verb, deteriorating)
1
diminuendo
1
dimming
1
discount(noun, cut, decline, reduction, lessening)
1
disintegrating
1
dissolution(noun, drop, decline, fall, failure)
1
downgrading(verb, deteriorating)
1
downturn(noun, drop, cut, decline, fall)
1
draining
1
drop(noun, cut, fall, decrease, retreat)
1
dwindle
1
dying down(expression, adjective, weakening, lessening, declining)
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APASmart Define. (2015). waning thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/waning/thesaurus/synonyms
ChicagoSmart Define. 2015. "waning thesaurus" https://smartdefine.org/waning/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, waning thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/waning/thesaurus/synonyms>.
MLASmart Define. "waning thesaurus" 13 April 2015. Web. 24 September 2026. <https://smartdefine.org/waning/thesaurus/synonyms>