Rational and Unwarranted
Opposite meaning words
Rational
Rational adjective - Based on sound reasoning or information.
Usage example: betting all of your savings on the lottery is not a rational move
Unwarranted is an antonym for rational.
Unwarranted
Unwarranted adjective - Having no basis in reason or fact.
Usage example: don't leap to unwarranted conclusions
Rational is an antonym for unwarranted.
Nearby Word: unwarrantable
Cite this Source
Unwarranted and Rational. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/rational/unwarranted
Rational & Unwarranted. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/rational/unwarranted>.
Unwarranted or Rational. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/rational/unwarranted.
Google Ngram Viewer shows how "rational" and "unwarranted" have occurred on timeline