Invalid
Invalid adjective - Chronically or repeatedly suffering from poor health.
Nonexistent and invalid are semantically related. In some cases you can use "Nonexistent" instead an adjective "Invalid".
Nonexistent
Nonexistent adjective - Not present or in evidence.
Invalid and nonexistent are semantically related. Sometimes you can use "Invalid" instead an adjective "Nonexistent".
Mutual synonyms
Cite this Source
Nonexistent and Invalid. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/invalid/nonexistent
Invalid & Nonexistent. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/invalid/nonexistent>.
Nonexistent or Invalid. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/invalid/nonexistent.
Google Ngram Viewer shows how "invalid" and "nonexistent" have occurred on timeline