Unsound
Unsound adjective - Not using or following good reasoning.
Usage example: it is clearly unsound to argue that just because a scientific explanation for that phenomenon does not currently exist, no such explanation is possible
Unexplainable and unsound are semantically related. In some cases you can use "Unexplainable" instead an adjective "Unsound".
Unexplainable
Unexplainable adjective - Impossible to explain.
Usage example: a series of unexplainable weather events
Unsound and unexplainable are semantically related. Sometimes you can use "Unsound" instead an adjective "Unexplainable".
Mutual synonyms
Cite this Source
Unexplainable and Unsound. (2016). Retrieved 2026, July 28, from https://thesaurus.plus/related/unsound/unexplainable
Unsound & Unexplainable. N.p., 2016. Web. 28 Jul. 2026. <https://thesaurus.plus/related/unsound/unexplainable>.
Unexplainable or Unsound. 2016. Accessed July 28, 2026. https://thesaurus.plus/related/unsound/unexplainable.
Google Ngram Viewer shows how "unsound" and "unexplainable" have occurred on timeline