108 entries under foul topic. ×

3
lousy(adjective, bad, offensive, unpleasant)
3
moldy(adjective, rank, corrupt, disgusting)
3
stale(adjective, rank, corrupt, disgusting)
3
tainted(adjective, rank, corrupt, disgusting)
2
dirty(adjective, bad, evil, nasty, offensive)
2
filthy(adjective, bad, evil, offensive, base)
2
frowzy(adjective, bad, rank, disagreeable)
2
fusty(adjective, rank, disagreeable, sour)
2
gamy(adjective, bad, rank, disagreeable)
2
high(adjective, bad, rank, disagreeable)
2
insalutary(adjective, offensive, disgusting, harmful)
2
malevolent(adjective, mean, bad, wrong, evil)
2
serious(adjective, bad, offensive, revolting)
2
severe(adjective, bad, offensive, revolting)
2
stenchy(adjective, rotten, stinking, smelly)
2
ugly(adjective, bad, evil, offensive, base)
2
unappetizing(adjective, bad, offensive, revolting)
2
unclean(adjective, bad, offensive, dirty)
1
decayed(adjective, bad, corrupt, disgusting)
1
decomposed(adjective, bad, corrupt, disgusting)
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APASmart Define. (2015). noxious thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/noxious/thesaurus/synonyms
ChicagoSmart Define. 2015. "noxious thesaurus" https://smartdefine.org/noxious/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, noxious thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/noxious/thesaurus/synonyms>.
MLASmart Define. "noxious thesaurus" 17 July 2015. Web. 26 September 2026. <https://smartdefine.org/noxious/thesaurus/synonyms>