4
scandalous(adjective, wrong, wicked, criminal, vice)
4
shameful(adjective, vice)
4
treacherous(adjective, dishonest)
4
verboten(adjective, illegal)
3
abominable
3
against the law(expression, adjective, idiom, wrong, illegitimate)
3
blameworthy(adjective, wicked)
3
delinquent
3
deplorable(adjective, wrong, wicked, senseless, criminal)
3
devious(adjective, dishonest)
3
dirty(wrong, wicked, senseless, criminal, illegal)
3
disgraceful
3
dishonorable(adjective, dishonest)
3
evildoing(adjective, wicked)
3
fraudulent(adjective, dishonest)
3
lawbreaking(adjective, wicked, criminal)
3
outlaw
3
reprehensible(adjective, wicked)
3
shady(wrong, wicked, irregular, senseless, unwarranted)
3
traitorous(adjective, dishonest)
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APASmart Define. (2015). felonious thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/felonious/thesaurus/synonyms
ChicagoSmart Define. 2015. "felonious thesaurus" https://smartdefine.org/felonious/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, felonious thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/felonious/thesaurus/synonyms>.
MLASmart Define. "felonious thesaurus" 13 April 2015. Web. 24 September 2026. <https://smartdefine.org/felonious/thesaurus/synonyms>