Irrational and Unsubstantiated

Irrational

Irrational adjective - Not using or following good reasoning.

Unsubstantiated and irrational are semantically related. In some cases you can use "Unsubstantiated" instead an adjective "Irrational".

Nearby Words: irrationality, irrationally

Unsubstantiated

Unsubstantiated adjective - Having no basis in reason or fact.
Usage example: an unsubstantiated claim that was thrown out of court

Irrational and unsubstantiated are semantically related. Sometimes you can use "Irrational" instead an adjective "Unsubstantiated".

Nearby Word: unsubstantially
Cite this Source
Unsubstantiated and Irrational. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/irrational/unsubstantiated
Irrational & Unsubstantiated. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/irrational/unsubstantiated>.
Unsubstantiated or Irrational. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/irrational/unsubstantiated.
Google Ngram Viewer shows how "irrational" and "unsubstantiated" have occurred on timeline