indefensible vs unjustifiable

indefensible and unjustifiable both are adjectives.

Word	Noun	Adjective	Verb	Adverb
indefensible	No	Yes	No	No
unjustifiable	No	Yes	No	No

As adjectives, indefensible and unjustifiable are synonyms defined as:

indefensible and unjustifiable: incapable of being justified or explained

Other synonyms of indefensible include insupportable, unwarrantable, unwarranted.

indefensible (adjective)	unjustifiable (adjective)
incapable of being justified or explained	incapable of being justified or explained
(of theories etc) incapable of being defended or justified
not able to be protected against attack