12
rotten(adjective, strong, offensive, sweet, rank)
11
musty(adjective, strong, offensive, sweet, heavy)
9
not good
9
putrid(adjective, strong, offensive, sweet, rank)
9
rancid(adjective, rank, corrupt, foul, disgusting)
8
stale(adjective, strong, offensive, sweet, rank)
8
mouldy(adjective, disagreeable, balmy, archaic, aromatic)
7
fusty(adjective, heavy, rank, foul, disagreeable)
7
mildewed(adjective, deterioration, stale, musty, uncleanness)
6
bad(adjective, uncleanness, decayed)
5
blighted(verb, deterioration)
5
flyblown
5
high(adjective, uncleanness)
5
maggoty
5
passe(adjective, plain, dead, odd, out)
5
rank(noun, adjective, corrupt, foul, disgusting)
5
smelly(adjective, strong, offensive, sweet, rank)
4
antiquated(adjective, plain, odd, old, drab)
4
corrupt(adjective, disgusting, stale, rotten, uncleanness)
4
crumbling
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APASmart Define. (2015). moldy thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/moldy/thesaurus/synonyms
ChicagoSmart Define. 2015. "moldy thesaurus" https://smartdefine.org/moldy/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, moldy thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/moldy/thesaurus/synonyms>.
MLASmart Define. "moldy thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/moldy/thesaurus/synonyms>