THESAURUS
abjuration, abjurement, abrogation, absolute contradiction, annulment, contradiction, contrary assertion, contravention, controversion, countering, crossing, denial, disallowance, disavowal, disclaimer, disclamation, disownment, disproof, forswearing, gainsaying, impugnment, nullification, recantation, refutation, renunciation, repudiation, retractation, retraction, revocation