3
testimonial(noun, true, permit, record, sanction)
2
acknowledgment
2
agreement(noun, approval, authorization, proof, verification)
2
authenticating(approval, proof, verification, endorsement, validation)
2
avowal(noun, proof, verification, endorsement, substantiation)
2
check
2
credential(permit, warrant, document, license, diploma)
2
credentials(noun, information, reason, permit, sanction)
2
enfranchisement(noun, authorization)
2
exemplification(noun, evidence, witness)
2
exhibit(noun, information, reason, picture, evidence)
2
fact(noun, evidence)
2
go ahead(expression, approval, proof, verification, endorsement)
2
green light(expression, proof, verification, endorsement, substantiation)
2
license(noun, permit, authorization, warrant, document)
2
manifestation(noun, evidence)
2
nod(approval, proof, verification, endorsement, validation)
2
notarization(noun, authorization)
2
record(noun, information, reason, permit, picture)
2
sign(noun, hint, indication, seal, stamp)
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>