defensive vs justificatory

defensive is a noun but justificatory is not a noun.

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

As adjectives, defensive and justificatory are synonyms defined as:

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

Other synonyms of defensive include justificative.

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

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