disownment vs repudiation

disownment and repudiation both are nouns.

Word	Noun	Adjective	Verb	Adverb
disownment	Yes	No	No	No
repudiation	Yes	No	No	No

As nouns, repudiation is a hypernym of disownment; that is, repudiation is a word with a broader meaning than disownment:

Other hypernyms of disownment include renunciation.

disownment (noun)	repudiation (noun)
refusal to acknowledge as one's own	the exposure of falseness or pretensions
	rejecting or disowning or disclaiming as invalid
	refusal to acknowledge or pay a debt or honor a contract (especially by public authorities)