37 entries under extreme topic. ×

10
unjustifiable(adjective, wrong, unreasonable, improper)
10
unwarranted(adjective, right, reasonable, irregular)
5
undue(adjective, unreasonable, improper, senseless)
3
improper(adjective, wrong, stiff, extravagant)
2
illegitimate(adjective, irregular, improper, extravagant)
2
unconscionable(adjective, improper, senseless, excessive)
2
unlawful(adjective, irregular, improper, extravagant)
2
wrongful(adjective, irregular, improper, extravagant)
1
absonant(adjective, improper, senseless, excessive)
1
arbitrary(adjective, unreasonable, improper, stiff)
1
costing an arm and a leg(expression, adjective, idiom, improper)
1
dear(adjective, improper, senseless, excessive)
1
excessive(adjective, improper, senseless, unwarranted)
1
exorbitant(adjective, improper, senseless, excessive)
1
extortionate(adjective, improper, senseless, excessive)
1
far-out(adjective, unreasonable, improper, stiff)
1
immoderate(adjective, improper, senseless, excessive)
1
inordinate(adjective, improper, senseless, excessive)
1
intemperate(adjective, unreasonable, improper, extravagant)
1
out of bounds(expression, adjective, idiom, improper)
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APASmart Define. (2015). unwarrantable thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/unwarrantable/thesaurus/synonyms
ChicagoSmart Define. 2015. "unwarrantable thesaurus" https://smartdefine.org/unwarrantable/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, unwarrantable thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/unwarrantable/thesaurus/synonyms>.
MLASmart Define. "unwarrantable thesaurus" 13 April 2015. Web. 29 September 2026. <https://smartdefine.org/unwarrantable/thesaurus/synonyms>