21
vulgar(adjective, nasty, rude, crude, bad)
20
hideous(adjective, blue, evil, taste, nasty)
20
nauseous(adjective, strong, taste, offensive, sweet)
20
appalling(adjective, evil, taste, base, awful)
20
ghastly(adjective, dull, bad, nasty, offensive)
20
unpleasant(adjective, dull, mean, nasty, harsh)
19
wicked(adjective, bad, dirty, evil, disgusting)
19
corrupt(verb, adjective, mean, bad, hurt)
19
distasteful(adjective, bad, nasty, offensive, unpleasant)
19
unclean(adjective, dull, bad, blue, taste)
19
indecent(adjective, vulgar, offensive, coarse, wicked)
19
execrable(adjective, taste, nasty, awful, terrible)
19
noxious(adjective, mean, bad, wrong, evil)
19
low(adjective, vulgar, rude, nasty, offensive)
19
befoul(verb, disorder, ruin, catch, spoil)
19
malodorous(adjective, bad, strong, offensive, rude)
19
profane(adjective, verb, offensive, dirty, wicked)
19
smelly(adjective, bad, strong, spot, informal)
18
rotten(adjective, good, bad, strong, wrong)
18
heinous(adjective, bad, wrong, blue, evil)
10 years ago|60k views|share |citing 
APASmart Define. (2016). foul thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/foul/thesaurus/synonyms
ChicagoSmart Define. 2016. "foul thesaurus" https://smartdefine.org/foul/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, foul thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/foul/thesaurus/synonyms>.
MLASmart Define. "foul thesaurus" 29 March 2016. Web. 23 September 2026. <https://smartdefine.org/foul/thesaurus/synonyms>