authenticate synonym, authenticate definition | Thesaurus

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authenticate

  
  
attest, authorize, avouch, certify, confirm, endorse, guarantee, validate, verify, vouch for, warrant  
  
Antonyms     
   annul, invalidate, render null and void  
English Collins Dictionary - English synonyms & Thesaurus  
Collins

authenticate

  
  ( authenticates    3rd person present)   ( authenticating    present participle)   ( authenticated    past tense & past participle  ) If you authenticate something, you state officially that it is genuine after examining it.      verb  
He says he'll have no problem authenticating the stamp...      V n  

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