5
attestant(noun, law, person, witness)
4
witness(noun, law, person)
4
testifier(noun, law, person, witness)
4
voucher
3
deponent(noun, law, person, witness)
3
informant
2
affirmer
2
attestor(noun, witness)
2
authenticator
2
bystander
2
certifier
2
corroborator(noun, witness)
2
eyewitness
2
spectator
2
witnesser
1
adjurer
1
arguer
1
assertor
1
attest
1
attestations
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APASmart Define. (2015). attester thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/attester/thesaurus/synonyms
ChicagoSmart Define. 2015. "attester thesaurus" https://smartdefine.org/attester/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, attester thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/attester/thesaurus/synonyms>.
MLASmart Define. "attester thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/attester/thesaurus/synonyms>