51 entries under decline topic. ×

12
blight(noun, disease, weaken, lessen)
12
mold(noun, weaken, lessen, degenerate)
6
spoil(verb, weaken, lessen, degenerate)
5
rot(verb, weaken, lessen, stain)
4
decompose(verb, weaken, lessen, degenerate)
4
go bad(expression, weaken, lessen, degenerate)
4
putrefy(verb, weaken, lessen, degenerate)
3
break up(expression, weaken, lessen, degenerate)
3
crumble(verb, weaken, lessen, degenerate)
3
disintegrate(verb, weaken, lessen, degenerate)
3
molder(weaken, lessen, degenerate, deteriorate)
3
mortify(weaken, lessen, degenerate, deteriorate)
3
putresce(weaken, lessen, degenerate, deteriorate)
3
suppurate(weaken, lessen, degenerate, deteriorate)
2
be impaired(weaken, lessen, degenerate, deteriorate)
2
become contaminated(expression, weaken, lessen, degenerate)
2
collapse(weaken, lessen, degenerate, deteriorate)
2
corrode(verb, weaken, lessen, degenerate)
2
curdle(verb, weaken, lessen, degenerate)
2
defile(verb, weaken, lessen, degenerate)
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APASmart Define. (2015). mildew thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/mildew/thesaurus/synonyms
ChicagoSmart Define. 2015. "mildew thesaurus" https://smartdefine.org/mildew/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, mildew thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/mildew/thesaurus/synonyms>.
MLASmart Define. "mildew thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/mildew/thesaurus/synonyms>