Invalid
Invalid adjective - Having no basis in reason or fact.
Usage example: an invalid claim that can be easily disproved by the facts
Nonlogical and invalid are semantically related. In some cases you can use "Nonlogical" instead an adjective "Invalid".
Nonlogical
Invalid and nonlogical are semantically related. You can use "Invalid" instead an adjective "Nonlogical".
Cite this Source
Nonlogical and Invalid. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/invalid/nonlogical
Invalid & Nonlogical. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/invalid/nonlogical>.
Nonlogical or Invalid. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/invalid/nonlogical.
Google Ngram Viewer shows how "invalid" and "nonlogical" have occurred on timeline