20
unjustifiable(adjective, unwarranted, accusation, vice, forgiveness)
17
untenable(adjective, weak, vulnerable, submission, helpless)
12
inexcusable(adjective, wrong, unwarranted, unnecessary, accusation)
12
unpardonable(adjective, wrong, accusation, vice, forgiveness)
12
unsustainable(adjective, invalid, defended, verbal attack, untenable)
11
insupportable(adjective, defended, verbal attack, inexcusable)
10
unforgivable(adjective, wrong, unwarranted, forgiveness, unjustified)
10
unreasonable(adjective, unwarranted, unnecessary, wanton, unjustified)
10
unwarrantable(adjective, unwarranted, unnecessary, unjustified, undeserved)
10
unwarranted(adjective, right, reasonable, unnecessary, wanton)
7
inexpiable(adjective, vice, inexcusable)
7
vulnerable(adjective, insecure, exposed, helpless, powerless)
6
gratuitous(adjective, unwarranted, unnecessary, necessary, wanton)
6
groundless(adjective, senseless, unwarranted, wanton, gratuitous)
6
unfounded(adjective, senseless, unwarranted, wanton, gratuitous)
6
unjustified(adjective, unwarranted, unnecessary, wanton, unfounded)
5
baseless(adjective, senseless, unwarranted, wanton, gratuitous)
5
defenseless(adjective, vulnerable, insecure, exposed, helpless)
5
intolerable
5
outrageous(adjective, defended, verbal attack)
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APASmart Define. (2015). Indefensible thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/indefensible/thesaurus/synonyms
ChicagoSmart Define. 2015. "Indefensible thesaurus" https://smartdefine.org/indefensible/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, Indefensible thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/indefensible/thesaurus/synonyms>.
MLASmart Define. "Indefensible thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/indefensible/thesaurus/synonyms>