Unchallengeable and Unanswerable

Unchallengeable

Unchallengeable adjective - Not capable of being challenged or proved wrong.
Usage example: the contention that there are certain unchallengeable rules governing proper grammar

Unanswerable and unchallengeable are semantically related in incontrovertible topic. In some cases you can use "Unanswerable" instead an adjective "Unchallengeable", when it comes to topics like irrefutable.

Nearby Word: unchallenged

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

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

Nearby Word: unanswered
Cite this Source
Unanswerable and Unchallengeable. (2016). Retrieved 2026, July 28, from https://thesaurus.plus/related/unchallengeable/unanswerable
Unchallengeable & Unanswerable. N.p., 2016. Web. 28 Jul. 2026. <https://thesaurus.plus/related/unchallengeable/unanswerable>.
Unanswerable or Unchallengeable. 2016. Accessed July 28, 2026. https://thesaurus.plus/related/unchallengeable/unanswerable.
Google Ngram Viewer shows how "unchallengeable" and "unanswerable" have occurred on timeline