21
criminal(adjective, wrong, wicked, irregular, unwarranted)
21
villainous(adjective, wrong, wicked, criminal, vice)
17
corrupt(adjective, wrong, wicked, dishonest, criminal)
16
wicked(adjective, wrong, wicked, criminal, illegal)
16
illegal(adjective, wrong, wicked, senseless, criminal)
14
illicit(adjective, irregular, unwarranted, criminal, legal)
14
unlawful(adjective, wrong, irregular, unwarranted, criminal)
12
nefarious(adjective, wrong, wicked, criminal, vice)
11
evil(adjective, criminal)
10
wrongful(adjective, evil, criminal, illegal)
9
illegitimate(adjective, wrong, irregular, senseless, unwarranted)
9
iniquitous(adjective, wrong, wicked, criminal, illegal)
8
base(adjective, wicked, criminal, vice)
8
crooked(adjective, dishonest, irregular, unwarranted, criminal)
8
dishonest(adjective, dishonest)
8
malicious(adjective, criminal)
7
immoral(adjective, wrong, wicked, dishonest, criminal)
7
lawless(adjective, wrong, irregular, unwarranted, criminal)
7
sinister(adjective, wicked, vice)
7
unscrupulous(adjective, dishonest)
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APASmart Define. (2015). felonious thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/felonious/thesaurus/synonyms
ChicagoSmart Define. 2015. "felonious thesaurus" https://smartdefine.org/felonious/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, felonious thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/felonious/thesaurus/synonyms>.
MLASmart Define. "felonious thesaurus" 13 April 2015. Web. 20 September 2026. <https://smartdefine.org/felonious/thesaurus/synonyms>