1
relapse(noun, drop, decline, fall, decrease)
1
relapsing(verb, deteriorating)
1
reposeful
1
reposing
1
restful
1
resting
1
retiring
1
retreat(noun, drop, decrease, wane)
1
retreating
1
retrocession(noun, drop, decrease, retreat, wane)
1
retroflux(noun, drop, decrease, retreat, wane)
1
retrograde
1
retrogressing(verb, deteriorating)
1
retrogressive
1
reverting(verb, deteriorating)
1
rot(noun, decline, deterioration, degeneration)
1
run to seed(expression, idiom, age)
1
rust(noun, decline, deterioration, degeneration)
1
sagging(adjective, declining, shrinking, fading, lowering)
1
secluded
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APASmart Define. (2015). waning thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/waning/thesaurus/synonyms
ChicagoSmart Define. 2015. "waning thesaurus" https://smartdefine.org/waning/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, waning thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/waning/thesaurus/synonyms>.
MLASmart Define. "waning thesaurus" 13 April 2015. Web. 25 September 2026. <https://smartdefine.org/waning/thesaurus/synonyms>