inexcusable vs unwarranted

inexcusable and unwarranted both are adjectives.

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

inexcusable (adjective)	unwarranted (adjective)
without excuse or justification	incapable of being justified or explained
not excusable	lacking justification or authorization
	without a basis in reason or fact