CONFIRM Synonyms: 94 Similar and Opposite Words - Merriam-Webster
https://www.merriam-webster.com/thesaurus/confirm
WebSynonyms for CONFIRM: verify, argue, support, validate, corroborate, prove, certify, vindicate; Antonyms of CONFIRM: refute, disprove, rebut, deny, contradict, question, challenge, gainsay
DA: 27 PA: 11 MOZ Rank: 64