8
extreme(adjective, unreasonable, improper, stiff, extravagant)
8
unfair(adjective, right, reasonable, extreme, improper)
8
unjust(adjective, right, reasonable, extreme, stiff)
7
idle(adjective, true)
7
improper(adjective, suitable, unreasonable, extreme, senseless)
7
inexcusable(adjective, right, reasonable, unreasonable, improper)
7
unauthorized(adjective, permitted, laxity, sanctioned, illegality)
6
insupportable
6
preposterous(adjective, wrong, false, awkward, unreasonable)
6
unsupported
6
untenable(adjective, reasoning)
5
extortionate(adjective, unreasonable, extreme, improper, stiff)
5
unlawful(unreasonable, extreme, irregular, improper, senseless)
4
illegal(adjective, unreasonable, improper, excessive, prejudiced)
4
intemperate(adjective, extreme, improper, senseless, excessive)
4
undeserved(adjective, improper, excessive, unfair, iniquitous)
4
unmerited(adjective, wanton, iniquitous, unjust, unjustified)
4
unnecessary(adjective, unreasonable, extreme, useless, improper)
4
unprovoked(adjective, right, reasonable, excessive, wanton)
4
unrestrained(adjective, extreme, excessive, immoderate, intemperate)
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APASmart Define. (2016). unwarranted thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/unwarranted/thesaurus/synonyms
ChicagoSmart Define. 2016. "unwarranted thesaurus" https://smartdefine.org/unwarranted/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, unwarranted thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/unwarranted/thesaurus/synonyms>.
MLASmart Define. "unwarranted thesaurus" 11 January 2016. Web. 25 September 2026. <https://smartdefine.org/unwarranted/thesaurus/synonyms>