annulment vs abrogation

annulment and abrogation both are nouns.

Word	Noun	Adjective	Verb	Adverb
annulment	Yes	No	No	No
abrogation	Yes	No	No	No

As nouns, annulment and abrogation are synonyms defined as:

annulment and abrogation: the act of abrogating; an official or legal cancellation

Other synonyms of annulment include repeal.

annulment (noun)	abrogation (noun)
(law) a formal termination (of a relationship or a judicial proceeding etc)	the act of abrogating; an official or legal cancellation
the act of abrogating; an official or legal cancellation
the state of being cancelled or annulled