15
infamous(adjective, characteristic, good, evil, nasty)
15
polluted(adjective, bad, nasty, offensive, unpleasant)
15
rancid(adjective, bad, rank, disgusting, sour)
15
scandalous(adjective, characteristic, bad, wrong, evil)
14
funky(adjective, bad, spot, dirty, revolting)
14
improper(adjective, rude, dirty, raw, nasty)
14
repellant(adjective, dull, disgusting, ugly, bad-looking)
14
tainted(adjective, bad, spoil, offensive, unpleasant)
14
ugly(adjective, dull, bad, evil, like)
14
unspeakable(adjective, taste, awful, terrible, endured)
13
fulsome(adjective, awful, terrible, horrible, inexpedience)
13
immoral(adjective, bad, wrong, blue, evil)
13
mean(adjective, good, bad, wrong, evil)
13
raunchy(adjective, dull, bad, blue, slang)
13
rude(adjective, nasty, society, vulgar, raw)
13
smudge(verb, catch, spoil, dirty, stain)
13
unjust(adjective, dirty, corrupt, dishonest, unkind)
13
unsportsmanlike(adjective, feature, bad, spot, awful)
12
abusive(adjective, nasty, offensive, rude, unpleasant)
12
degenerate(adjective, action, bad, wrong, evil)
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APASmart Define. (2016). foul thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/foul/thesaurus/synonyms
ChicagoSmart Define. 2016. "foul thesaurus" https://smartdefine.org/foul/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, foul thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/foul/thesaurus/synonyms>.
MLASmart Define. "foul thesaurus" 29 March 2016. Web. 25 September 2026. <https://smartdefine.org/foul/thesaurus/synonyms>