66 entries under decline topic. ×

1
skid(weaken, degenerate, deteriorate, degrade)
1
spoil(verb, fail, lower, weaken)
1
undermine(weaken, degenerate, deteriorate, degrade)
1
vitiate(reduce, weaken, lapse, degenerate)
1
wear away(expression, weaken, degenerate, deteriorate)
0
die(verb, lapse, deteriorate, worsen)
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APASmart Define. (2016). retrogress thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/retrogress/thesaurus/synonyms
ChicagoSmart Define. 2016. "retrogress thesaurus" https://smartdefine.org/retrogress/thesaurus/synonyms (accessed September 28, 2026).
HarvardSmart Define 2016, retrogress thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/retrogress/thesaurus/synonyms>.
MLASmart Define. "retrogress thesaurus" 14 March 2016. Web. 28 September 2026. <https://smartdefine.org/retrogress/thesaurus/synonyms>