Synonyms|457Antonyms|115|Broader|9Narrower|12Related|204
1
penal
1
petty(corrupt, unreasonable, dishonest, improper, unwarranted)
1
pirated(adjective, permitted, unjustified, pirate, unauthorized)
1
prejudiced(adjective, cruel, unreasonable, dishonest, improper)
1
questionable
1
racket(adjective, wrong, senseless, illegitimate, unlawful)
1
restricted(adjective, offensive, permitted, prohibited, unthinkable)
1
ruthless
1
sacrilegious
1
secret
1
shifty(adjective, evil, corrupt, dishonest, immoral)
1
sinister(adjective, corrupt, unreasonable, immoral, improper)
1
slippery(wrong, corrupt, dishonest, immoral, deceitful)
1
sneaky(adjective, bad, wrong, corrupt, dishonest)
1
tabooed
1
too great(expression, adjective, unreasonable, improper, excessive)
1
triable
1
two-faced(wrong, corrupt, dishonest, immoral, deceitful)
1
unacceptable(adjective, offensive, worthless, permitted, prohibited)
1
unapproved
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APASmart Define. (2015). illegal thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/illegal/thesaurus/synonyms
ChicagoSmart Define. 2015. "illegal thesaurus" https://smartdefine.org/illegal/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, illegal thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/illegal/thesaurus/synonyms>.
MLASmart Define. "illegal thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/illegal/thesaurus/synonyms>