Not possible
Nonviable and not possible are semantically related. In some cases you can use "Nonviable" instead an adjective phrase "Not possible".
Nonviable
Nonviable adjective - Not capable of living or developing successfully.
Not possible and nonviable are semantically related. You can use "Not possible" instead an adjective "Nonviable".
Cite this Source
Nonviable and Not possible. (2016). Retrieved 2026, July 28, from https://thesaurus.plus/related/not_possible/nonviable
Not possible & Nonviable. N.p., 2016. Web. 28 Jul. 2026. <https://thesaurus.plus/related/not_possible/nonviable>.
Nonviable or Not possible. 2016. Accessed July 28, 2026. https://thesaurus.plus/related/not_possible/nonviable.
Google Ngram Viewer shows how "not possible" and "nonviable" have occurred on timeline