Indubitable and Unanswerable

Indubitable

Indubitable adjective - Not capable of being challenged or proved wrong.
Usage example: the indubitable fact that there are no more woolly mammoths or saber-toothed tigers around

Unanswerable and indubitable are semantically related in irrefutable topic. In some cases you can use "Unanswerable" instead an adjective "Indubitable".

Nearby Word: indubitably

Unanswerable

Unanswerable adjective - Not capable of being challenged or proved wrong.
Usage example: the unanswerable assertion that she didn't know much about art but she knew what she liked

Indubitable and unanswerable are semantically related in definite topic. You can use "Indubitable" instead an adjective "Unanswerable", if it concerns topics such as irrefutable, beyond question.

Nearby Word: unanswered
Cite this Source
Unanswerable and Indubitable. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/indubitable/unanswerable
Indubitable & Unanswerable. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/indubitable/unanswerable>.
Unanswerable or Indubitable. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/indubitable/unanswerable.
Google Ngram Viewer shows how "indubitable" and "unanswerable" have occurred on timeline