11
indefensible(adjective, unwarranted, unnecessary, unjustified, undeserved)
10
unjustifiable(adjective, wrong, unreasonable, extreme, improper)
10
unwarranted(adjective, right, reasonable, extreme, irregular)
6
insupportable
5
illegal(adjective, wrong, unreasonable, improper, excessive)
5
inexcusable(adjective, forgivable)
5
undue(adjective, unreasonable, extreme, improper, senseless)
5
unforgivable
5
unpardonable
5
unreasonable(adjective, wrong, improper, excessive, unwarranted)
4
unallowable
4
unjustified(adjective, wrong, improper, excessive, unwarranted)
3
improper(adjective, wrong, extreme, stiff, extravagant)
3
inexpiable
3
unauthorized
3
unofficial
2
baseless
2
black-market(adjective, irregular, unwarranted, criminal, illegal)
2
contrary to law(expression, idiom, illegal, illicit)
2
criminal(adjective, irregular, unwarranted, illegal, illegitimate)
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APASmart Define. (2015). unwarrantable thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/unwarrantable/thesaurus/synonyms
ChicagoSmart Define. 2015. "unwarrantable thesaurus" https://smartdefine.org/unwarrantable/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, unwarrantable thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/unwarrantable/thesaurus/synonyms>.
MLASmart Define. "unwarrantable thesaurus" 13 April 2015. Web. 22 September 2026. <https://smartdefine.org/unwarrantable/thesaurus/synonyms>