AUTHENTICATE /ɔ.ˈθɛn.tɪ.keɪt/ Scrabble 17 Words With Friends 19 Definition verb establish the authenticity of something. Examples “The experts confirmed it was an authentic signature.”“The report was completely authentic.”“He didn't manage to authenticate the portrait: it's probably a fake.” See all 272 words you can make from AUTHENTICATE → 12-letter words Words starting with A Words ending with E ← Unscramble different letters