3
ratifier
2
affirmer
2
approver
2
certifier
2
consolidator
2
corroborator
2
endorser
2
strengthener
2
validator
2
verifier
1
acknowledger
1
ascertainer
1
assertor
1
assurer
1
attester
1
authenticator
1
authorizer
1
avower
1
backer
1
bolsterer
11 years ago|3.3k views|share |citing 
APASmart Define. (2015). confirmer thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/confirmer/thesaurus/synonyms
ChicagoSmart Define. 2015. "confirmer thesaurus" https://smartdefine.org/confirmer/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, confirmer thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/confirmer/thesaurus/synonyms>.
MLASmart Define. "confirmer thesaurus" 13 April 2015. Web. 20 September 2026. <https://smartdefine.org/confirmer/thesaurus/synonyms>