Questionable and Unsolvable

Questionable

Questionable adjective - Giving good reason for being doubted, questioned, or challenged.

Unsolvable and questionable are semantically related. In some cases you can use "Unsolvable" instead an adjective "Questionable".

Unsolvable

Unsolvable adjective - Incapable of being solved or accomplished.
Usage example: an apparently unsolvable problem

Questionable and unsolvable are semantically related. Sometimes you can use "Questionable" instead an adjective "Unsolvable".
Cite this Source
Unsolvable and Questionable. (2016). Retrieved 2026, July 29, from https://thesaurus.plus/related/questionable/unsolvable
Questionable & Unsolvable. N.p., 2016. Web. 29 Jul. 2026. <https://thesaurus.plus/related/questionable/unsolvable>.
Unsolvable or Questionable. 2016. Accessed July 29, 2026. https://thesaurus.plus/related/questionable/unsolvable.
Google Ngram Viewer shows how "questionable" and "unsolvable" have occurred on timeline