Invalid and Nonviable

Invalid

Invalid adjective - Chronically or repeatedly suffering from poor health.

Nonviable and invalid are semantically related. In some cases you can use "Nonviable" instead an adjective "Invalid".

Nonviable

Nonviable adjective - Not capable of living or developing successfully.

Invalid and nonviable are semantically related. Sometimes you can use "Invalid" instead an adjective "Nonviable".
Cite this Source
Nonviable and Invalid. (2016). Retrieved 2026, July 28, from https://thesaurus.plus/related/invalid/nonviable
Invalid & Nonviable. N.p., 2016. Web. 28 Jul. 2026. <https://thesaurus.plus/related/invalid/nonviable>.
Nonviable or Invalid. 2016. Accessed July 28, 2026. https://thesaurus.plus/related/invalid/nonviable.
Google Ngram Viewer shows how "invalid" and "nonviable" have occurred on timeline