5
support(noun, approval, evidence, proof, justification)
4
acceptance(noun, approval, proof, verification, endorsement)
4
assent(noun, approval, evidence, authorization, proof)
4
certificate(noun, security, document, license, diploma)
4
declaration(noun, evidence, confirmation, verification)
4
demonstration(noun, information, reason, true, picture)
4
indication(noun, hint, evidence, witness, seal)
4
permission(noun, approval, authorization)
4
seal(noun, hint, indication, proof, confirmation)
4
testament(noun, information, reason, true, permit)
3
approbation(noun, approval)
3
consent(noun, approval, authorization, proof, verification)
3
deposition(noun, information, reason, picture, evidence)
3
designation(noun, authorization)
3
establishment(noun, information, reason, picture, evidence)
3
identification
3
information(noun, reason, picture, evidence, witness)
3
mark(noun, hint, indication, seal, stamp)
3
stamp(noun, hint, indication, proof, seal)
3
statement(noun, evidence)
11 years ago|5k views|share |citing 
APASmart Define. (2015). authentication thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/authentication/thesaurus/synonyms
ChicagoSmart Define. 2015. "authentication thesaurus" https://smartdefine.org/authentication/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, authentication thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/authentication/thesaurus/synonyms>.
MLASmart Define. "authentication thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/authentication/thesaurus/synonyms>