80 entries under illegal topic. ×

16
unethical(adjective, bad, wrong, evil, rude)
15
criminal(noun, adjective, bad, wrong, evil)
15
impure(noun, adjective, good, mixed, blue)
13
dishonest(adjective, bad, wrong, evil, corrupt)
13
nefarious(adjective, bad, wrong, evil, base)
12
unscrupulous(adjective, bad, wrong, evil, corrupt)
11
dishonorable(adjective, bad, wrong, low, corrupt)
11
smutty(adjective, blue, nasty, offensive, rude)
9
crooked(adjective, bad, wrong, corrupt, vicious)
9
pornographic(adjective, blue, evil, offensive, rude)
9
sordid(adjective, corrupt, dishonest, shameful, crooked)
8
despicable(adjective, evil, low, base, corrupt)
8
salacious(adjective, blue, offensive, rude, wild)
7
felonious(adjective, wrong, wicked, dishonest, criminal)
5
deceitful(adjective, corrupt, wicked, dishonest, contrary)
5
fraudulent(adjective, corrupt, dishonest, crooked, shady)
5
mean(adjective, bad, wrong, evil, low)
5
uncleanly(adjective, good, nasty, restraint, dirty)
5
underhanded(adjective, low, corrupt, dishonest, deceitful)
5
unfair(adjective, bad, wrong, evil, corrupt)
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APASmart Define. (2015). immoral thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/immoral/thesaurus/synonyms
ChicagoSmart Define. 2015. "immoral thesaurus" https://smartdefine.org/immoral/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2015, immoral thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/immoral/thesaurus/synonyms>.
MLASmart Define. "immoral thesaurus" 3 August 2015. Web. 27 September 2026. <https://smartdefine.org/immoral/thesaurus/synonyms>