exculpation vs self-justification

exculpation and self-justification both are nouns.

Word	Noun	Adjective	Verb	Adverb
exculpation	Yes	No	No	No
self-justification	Yes	No	No	No

As nouns, exculpation and self-justification are synonyms defined as:

exculpation and self-justification: a defense of some offensive behavior or some failure to keep a promise etc.

Other synonyms of exculpation include alibi, excuse.

exculpation (noun)	self-justification (noun)
the act of freeing from guilt or blame	a defense of some offensive behavior or some failure to keep a promise etc.
a defense of some offensive behavior or some failure to keep a promise etc.