Authoritative and Decisive

Authoritative

Authoritative adjective - Being the most accurate and apparently thorough.
Usage example: this book is considered the most authoritative source on that subject

Decisive is a synonym for authoritative in decide topic. In some cases you can use "Decisive" instead an adjective "Authoritative", when it comes to topics like authentic, conclusive, domineering, commanding.

Nearby Words: authority, authoritarian

Decisive

Decisive adjective - Having the power to persuade.
Usage example: a lawyer who knows how to construct the kind of decisive argument that sways a jury

Authoritative is a synonym for decisive in decide topic. You can use "Authoritative" instead an adjective "Decisive", if it concerns topics such as authentic, conclusive.

Cite this Source
Decisive and Authoritative. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/authoritative/decisive
Authoritative & Decisive. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/authoritative/decisive>.
Decisive or Authoritative. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/authoritative/decisive.
Google Ngram Viewer shows how "authoritative" and "decisive" have occurred on timeline