unwarrantable vs unwarranted

unwarrantable and unwarranted both are adjectives.

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

As adjectives, unwarrantable and unwarranted are synonyms defined as:

unwarrantable and unwarranted: incapable of being justified or explained

Other synonyms of unwarrantable include indefensible, insupportable, unjustifiable.

unwarrantable (adjective)	unwarranted (adjective)
incapable of being justified or explained	incapable of being justified or explained
	lacking justification or authorization
	without a basis in reason or fact