6
demonstration(noun, information, reason, display, true)
6
permission(noun, support, sanction, authorization, commendation)
5
acceptance(noun, approval, authorization, proof, confirmation)
5
admission(noun, approval, proof, confirmation, verification)
5
agreement(noun, support, approval, sanction, evidence)
5
assent(noun, support, approval, sanction, evidence)
5
assurance(noun, affirmation)
5
consent(noun, support, approval, sanction, evidence)
4
avowal(noun, proof, confirmation, verification, affirmation)
4
declaration(noun, evidence, confirmation, verification, affirmation)
4
determination(noun, evidence)
4
seal
4
testament(noun, information, reason, true, picture)
4
witness(noun, information, reason, picture, evidence)
3
check
3
fact(noun, evidence)
3
go ahead(noun, expression, approval, proof, confirmation)
3
green light(noun, expression, support, approval, sanction)
3
imprimatur
3
justification(noun, reason, explanation, reasoning, defense)
11 years ago|6.6k views|share |citing 
APASmart Define. (2015). validation thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/validation/thesaurus/synonyms
ChicagoSmart Define. 2015. "validation thesaurus" https://smartdefine.org/validation/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, validation thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/validation/thesaurus/synonyms>.
MLASmart Define. "validation thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/validation/thesaurus/synonyms>