justificative vs defensive

justificative is not a noun while defensive is a noun.

Word	Noun	Adjective	Verb	Adverb
justificative	No	Yes	No	No
defensive	Yes	Yes	No	No

As adjectives, justificative and defensive are synonyms defined as:

justificative and defensive: attempting to justify or defend in speech or writing

Other synonyms of justificative include justificatory.

justificative (noun)	defensive (noun)
	an attitude of defensiveness

justificative (adjective)	defensive (adjective)
attempting to justify or defend in speech or writing	intended or appropriate for defending against or deterring aggression or attack
providing justification	attempting to justify or defend in speech or writing