Authoritative
Authoritative adjective - Being the most accurate and apparently thorough.
Usage example: this book is considered the most authoritative source on that subject
Thorough and authoritative are semantically related. In some cases you can use "Thorough" instead an adjective "Authoritative".
Nearby Words: authority, authoritarian
Thorough
Thorough adjective - Having no exceptions or restrictions.
Authoritative and thorough are semantically related. Sometimes you can use "Authoritative" instead an adjective "Thorough".
Nearby Words: thoroughly, thoroughness
Cite this Source
Thorough and Authoritative. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/authoritative/thorough
Authoritative & Thorough. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/authoritative/thorough>.
Thorough or Authoritative. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/authoritative/thorough.
Google Ngram Viewer shows how "authoritative" and "thorough" have occurred on timeline