Open English Wordnet
Nouns
(n)repudiation, renunciationrejecting or disowning or disclaiming as invalid“Congressional repudiation of the treaty that the President had negotiated”
(n)repudiationrefusal to acknowledge or pay a debt or honor a contract (especially by public authorities)“the repudiation of the debt by the city”
(n)repudiation, debunkingthe exposure of falseness or pretensions“the debunking of religion has been too successful”