Synonyms of denials

1 Syllable
nay, nix
2 Syllables
dissent, veto, gainsaying, brush-off, disproof, turndown, rebuff
3 Syllables
repulse, retraction, refusing, rejecting, rebuttal, negation, abstaining, refutal, dismissing, refraining, rejection, disclaimer, forswearing
4 Syllables
declination, renouncement, negative, noncommittal, repudiating, refutation, disapproval, disavowal, prohibition, renunciation, controversion, renegement, adjuration, contradiction, repudiation, protestation
5 Syllables
disallowance, nonacceptance