GAINSAY Synonyms: 59 Similar and Opposite Words - Merriam-Webster
https://www.merriam-webster.com/thesaurus/gainsay
WEBSynonyms for GAINSAY: deny, refute, reject, contradict, disavow, disclaim, negate, repudiate; Antonyms of GAINSAY: acknowledge, admit, confirm, allow, concede, accept, own, adopt.
DA: 75 PA: 24 MOZ Rank: 88