99 entries under decline topic. ×

2
perish(verb, blow, weaken, lessen)
2
pollute(verb, weaken, lessen, degenerate)
2
putrefy(weaken, lessen, degenerate, deteriorate)
2
putresce(weaken, lessen, degenerate, deteriorate)
2
reach depths(expression, weaken, lessen, degenerate)
2
shrivel(weaken, lessen, degenerate, deteriorate)
2
sicken(verb, worry, fail, strain)
2
slump(weaken, lessen, degenerate, deteriorate)
2
soften(verb, dull, hurt, ruin)
2
suppurate(weaken, lessen, degenerate, deteriorate)
2
thin(verb, reduce, fail, halt)
2
turn(weaken, lessen, degenerate, deteriorate)
2
wane(verb, fail, blow, weaken)
2
waste away(expression, weaken, lessen, degenerate)
2
wear away(verb, expression, phrasal verb, weaken)
2
wilt(verb, fail, blow, lower)
2
wither(verb, blow, weaken, lessen)
1
adulterate(verb, reduce, fail, halt)
1
cut(verb, reduce, fail, halt)
1
dilute(verb, reduce, fail, halt)
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APASmart Define. (2016). sap thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/sap/thesaurus/synonyms
ChicagoSmart Define. 2016. "sap thesaurus" https://smartdefine.org/sap/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, sap thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/sap/thesaurus/synonyms>.
MLASmart Define. "sap thesaurus" 28 March 2016. Web. 25 September 2026. <https://smartdefine.org/sap/thesaurus/synonyms>