6
withering(verb, adjective, deteriorating)
5
aging(noun, verb, stale, fading, aging)
5
declension(noun, refusal)
5
declination(noun, refusal, striction)
5
disintegrating
5
down(adjective, mean, bad, weak, lower)
5
dying(adjective, last, failing, critical, hazy)
5
regressive(adjective, regressive)
5
relapsing(verb, adjective, deteriorating, regressive, regressing)
5
sagging(adjective, inferior, depressed, shrinking, fading)
5
senile(adjective, age, aged)
5
shrinking(verb, adjective, shy, lessening, lowering)
5
worsening(verb, adjective, backward, weakening, lessening)
4
backsliding(verb, adjective, regressive, regressing)
4
decline(noun, cut, reduction, refusal, lessening)
4
decrease(noun, cut, reduction, lessening, diminishing)
4
degenerating(verb, adjective, deteriorating)
4
denial(noun, disapproval, rejection, refusal)
4
diminishing(noun, adjective, cut, decline, reduction)
4
disappearing(adjective, lessening, dying, fading, deteriorating)
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APASmart Define. (2015). declining thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/declining/thesaurus/synonyms
ChicagoSmart Define. 2015. "declining thesaurus" https://smartdefine.org/declining/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, declining thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/declining/thesaurus/synonyms>.
MLASmart Define. "declining thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/declining/thesaurus/synonyms>