alibi vs exculpation

alibi and exculpation both are nouns.

Word	Noun	Adjective	Verb	Adverb
alibi	Yes	No	Yes	No
exculpation	Yes	No	No	No

As nouns, alibi and exculpation are synonyms defined as:

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

Other synonyms of alibi include excuse, self-justification.

alibi (noun)	exculpation (noun)
(law) a defense by an accused person purporting to show that he or she could not have committed the crime in question	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.

alibi (verb)	exculpation (verb)
exonerate by means of an alibi