108 entries under foul topic. ×

14
evil(adjective, mean, bad, wrong, nasty)
14
hurtful(adjective, mean, bad, wrong, evil)
14
repugnant(adjective, bad, evil, offensive, base)
13
damaging(adjective, mean, bad, wrong, evil)
13
rotten(adjective, bad, rank, disagreeable)
12
fetid(adjective, rank, corrupt, disgusting)
12
mephitic(adjective, bad, evil, offensive, corrupt)
12
repellent(adjective, bad, evil, offensive, base)
11
odious(adjective, bad, offensive, revolting)
11
pestilential(adjective, help, bad, evil)
11
putrid(adjective, rank, disgusting, disagreeable)
11
rancid(adjective, awful, rank, dirty)
10
insalubrious(adjective, offensive, unpleasant, disgusting)
10
horrible(adjective, evil, nasty, offensive, unpleasant)
10
mischievous(adjective, mean, bad, nasty, offensive)
10
rank(adjective, corrupt, disgusting, disagreeable)
9
awful(adjective, mean, bad, nasty, offensive)
9
objectionable(adjective, bad, offensive, unpleasant)
9
ruinous(adjective, mean, bad, wrong, evil)
8
malodorous(adjective, bad, offensive, rank)
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APASmart Define. (2015). noxious thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/noxious/thesaurus/synonyms
ChicagoSmart Define. 2015. "noxious thesaurus" https://smartdefine.org/noxious/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, noxious thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/noxious/thesaurus/synonyms>.
MLASmart Define. "noxious thesaurus" 17 July 2015. Web. 25 September 2026. <https://smartdefine.org/noxious/thesaurus/synonyms>