217 entries under verb topic. ×

4
clinch(settle, guarantee)
4
consent(approve, authorize, sanction, endorse)
4
legalize(endorse, prove, verify, substantiate)
4
license(state, approve, confirm, authorize)
4
manifest(show, determine, confirm, verify)
4
underwrite(support, praise, favor, back)
3
agree(authorize, verify, substantiate, validate)
3
bless(support, praise, favor, back)
3
circumstantiate(support, determine, back, sign)
3
commission(state, approve, confirm, authorize)
3
declare(state, show, determine, confirm)
3
evince
3
exhibit(show, confirm, prove, appear)
3
make good(expression, idiom, support, back)
3
record
3
sign(support, back, approve, sanction)
3
state(confirm, appear, verify, swear)
3
strengthen(confirm, story, verify, substantiate)
3
try(check, show, determine, display)
2
adduce
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APASmart Define. (2015). authenticate thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/authenticate/thesaurus/synonyms
ChicagoSmart Define. 2015. "authenticate thesaurus" https://smartdefine.org/authenticate/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, authenticate thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/authenticate/thesaurus/synonyms>.
MLASmart Define. "authenticate thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/authenticate/thesaurus/synonyms>