Synonyms of unjustifiable

1 Syllable
wrong
2 Syllables
undue, groundless, pricey, unfair, unjust, pricier
3 Syllables
unsporting, overkill, baseless, unfounded, ungrounded
4 Syllables
undeserved, unjustified, unwarranted, unprovoked, inexpiable, uncalled-for, unmerited, foundationless, unreasoned
5 Syllables
inexcusable, indefensible, unconscionable, unforgivable, criticizable, unpardonable, unpermissible, unwarrantable
6 Syllables
uncorroborated