17
iniquitous(adjective, mean, bad, wrong, evil)
17
mucky(adjective, dull, flat, nasty, offensive)
17
muddy(verb, adjective, upset, hurt, harm)
17
scurrilous(adjective, blue, offensive, rude, coarse)
17
shameful(adjective, characteristic, bad, wrong, evil)
16
vicious(adjective, bad, wrong, evil, nasty)
16
despicable(adjective, good, bad, evil, nasty)
16
nefarious(adjective, good, bad, wrong, evil)
16
ribald(adjective, rude, dirty, raw, nasty)
16
scatological(adjective, dull, blue, rough, nasty)
16
stormy(adjective, nature, severe, rough, dark)
16
sully(verb, hurt, catch, spoil, dirty)
16
unfair(adjective, evil, corrupt, dishonest, immoral)
15
besmirch(verb, hurt, disorder, ruin, catch)
15
choke(verb, catch, hinder, dirty, polluted)
15
clog(verb, action, catch, hinder, spoil)
15
depraved(adjective, adverb, bad, wrong, evil)
15
disgraceful(adjective, evil, taste, offensive, unpleasant)
15
gruesome(adjective, taste, awful, terrible, endured)
15
impure(adjective, dull, bad, mixed, blue)
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APASmart Define. (2016). foul thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/foul/thesaurus/synonyms
ChicagoSmart Define. 2016. "foul thesaurus" https://smartdefine.org/foul/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, foul thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/foul/thesaurus/synonyms>.
MLASmart Define. "foul thesaurus" 29 March 2016. Web. 24 September 2026. <https://smartdefine.org/foul/thesaurus/synonyms>