https://www.merriam-webster.com/thesaurus/avouching
AVOUCHING Synonyms: 87 Similar and Opposite Words | Merriam-Webster Thesaurus
Synonyms for AVOUCHING: testifying (to), guaranteeing, affirming, certifying, vouching (for), attesting, witnessing, authenticating; Antonyms of AVOUCHING:...
opposite wordsmerriam webstersynonymssimilarthesaurus