2
unfair(adjective, unreasonable, extreme, improper, stiff)
2
ungenuine(adjective, fake, false, counterfeit, inferior)
2
unreal(fake, false, bogus)
2
unreasonable(adjective, extreme, improper, stiff, extravagant)
2
unwarrantable(adjective, extreme, irregular, improper, extravagant)
2
unwarranted(extreme, irregular, improper, senseless, excessive)
2
villainous(adjective, wrong, illegal, unlawful)
1
abominable
1
absonant(adjective, unreasonable, extreme, improper, stiff)
1
anarchic
1
anarchistic
1
anomic
1
arbitrary(adjective, unreasonable, extreme, improper, stiff)
1
artful(hidden, sly, fraudulent)
1
awful
1
bad
1
badly
1
banned
1
bantling
1
bar sinister
11 years ago|17k views|share |citing 
APASmart Define. (2015). illegitimate thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/illegitimate/thesaurus/synonyms
ChicagoSmart Define. 2015. "illegitimate thesaurus" https://smartdefine.org/illegitimate/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, illegitimate thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/illegitimate/thesaurus/synonyms>.
MLASmart Define. "illegitimate thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/illegitimate/thesaurus/synonyms>