2
out of line(expression, idiom, wrong, senseless, permitted)
2
pirate
2
ruled out(expression, offensive, permitted, prohibited, unthinkable)
2
scandalous(wrong, corrupt, wicked, dishonest, criminal)
2
shameless(corrupt, unreasonable, dishonest, improper, deceitful)
2
tabu
2
terrible
2
unallowed
2
under the table(expression, adjective, permitted, illegitimate, unjustified)
2
undeserved(adjective, unreasonable, improper, excessive, unwarranted)
2
unfit
2
unmerited(unwarranted, iniquitous, unjust)
2
unrighteous(wrong, senseless, unlawful, lawless, illicit)
2
unrightful(unreasonable, improper, unwarranted, prejudiced, iniquitous)
2
unsuitable(adjective, unreasonable, improper, unwarranted, unnecessary)
2
untouchable
2
untrue(adjective, wrong, fake, deceitful, worthless)
2
vicious(wrong, unreasonable, improper, unwarranted, prejudiced)
2
villainous(adjective, wrong, wicked, criminal, unlawful)
2
wildcat(adjective, wrong, senseless, illegitimate, unlawful)
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APASmart Define. (2015). illegal thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/illegal/thesaurus/synonyms
ChicagoSmart Define. 2015. "illegal thesaurus" https://smartdefine.org/illegal/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, illegal thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/illegal/thesaurus/synonyms>.
MLASmart Define. "illegal thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/illegal/thesaurus/synonyms>