unwarrantable vs insupportable

unwarrantable and insupportable both are adjectives.

Word	Noun	Adjective	Verb	Adverb
unwarrantable	No	Yes	No	No
insupportable	No	Yes	No	No

As adjectives, unwarrantable and insupportable are synonyms defined as:

unwarrantable and insupportable: incapable of being justified or explained

Other synonyms of unwarrantable include indefensible, unjustifiable, unwarranted.

unwarrantable (adjective)	insupportable (adjective)
incapable of being justified or explained	incapable of being justified or explained