repudiation vs debunking

repudiation and debunking both are nouns.

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

As nouns, repudiation and debunking are synonyms defined as:

repudiation (noun)	debunking (noun)
the exposure of falseness or pretensions	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)