173 entries under immoral topic. ×

5
debauched(adjective, bad, base, disgusting, dishonest)
5
harmful(adjective, mean, bad, wrong, evil)
5
inequitable(adjective, cruel, corrupt, unreasonable, dishonest)
5
infernal(adjective, evil, wicked, mysterious)
5
opprobrious(adjective, nasty, unpleasant, disgusting, vile)
5
unworthy(adjective, unclean, dishonorable, sinful)
5
wrong(noun, verb, adjective, break, cut)
4
blameworthy(adjective, cruel, unreasonable, dishonest)
4
grievous(adjective, cruel, unreasonable, dishonest)
4
injurious(adjective, mean, bad, wrong, evil)
4
pestilential(adjective, bad, vile, harmful)
4
sleazy(adjective, dull, bad, evil, rough)
4
unholy(adjective, bad, offensive, coarse, wicked)
4
unprincipled(adjective, bad, wrong, evil, violent)
3
bent(adjective, dishonest, rotten, untrustworthy)
3
biased(adjective, cruel, unreasonable, dishonest)
3
double-dealing(adjective, mean, base, dishonest)
3
grotesque(adjective, evil, plain, awful)
3
infected(adjective, nasty, dirty, coarse, disgusting)
3
one-sided(adjective, cruel, unreasonable, dishonest)
10 years ago|60k views|share |citing 
APASmart Define. (2016). foul thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/foul/thesaurus/synonyms
ChicagoSmart Define. 2016. "foul thesaurus" https://smartdefine.org/foul/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2016, foul thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/foul/thesaurus/synonyms>.
MLASmart Define. "foul thesaurus" 29 March 2016. Web. 29 September 2026. <https://smartdefine.org/foul/thesaurus/synonyms>