7
convincing(adjective, open, honest, sensible, true)
7
dogmatic(adjective, domineering)
7
effective(adjective, strong, energetic, important, powerful)
7
factual(adjective, correct, right, honest, exact)
7
faithful(adjective, solid, pure, proper, true)
7
leading(adjective, influential)
7
magisterial(adjective, severe, superior, regular, rigid)
7
positive
7
ruling(adjective, powerful, government, influential, official)
7
sure(adjective, clear, pure, certain, original)
7
veritable(adjective, correct, right, honest, exact)
6
supreme(adjective, clear, sound, powerful, influential)
6
approved(adjective, official, authorized)
6
lawful(adjective, good, sound, correct, right)
6
orthodox(adjective, accepted, traditional)
6
persuasive(adjective, good, strong, sound, right)
6
truthful(adjective, open, correct, right, honest)
6
verifiable
5
authorised
5
administrative(adjective, power, regular, government, court)
11 years ago|12k views|share |citing 
APASmart Define. (2015). authoritative thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/authoritative/thesaurus/synonyms
ChicagoSmart Define. 2015. "authoritative thesaurus" https://smartdefine.org/authoritative/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, authoritative thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/authoritative/thesaurus/synonyms>.
MLASmart Define. "authoritative thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/authoritative/thesaurus/synonyms>