Deductive and Irrational
Opposite meaning words
Deductive
Deductive adjective - Being or provable by reasoning in which the conclusion follows necessarily from given information.
Usage example: using deductive reasoning we must conclude that since everyone eventually dies, sooner or later it's going to be our turn
Irrational
Irrational adjective - Not using or following good reasoning.
Deductive is an antonym for irrational.
Nearby Words: irrationality, irrationally
Cite this Source
Irrational and Deductive. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/deductive/irrational
Deductive & Irrational. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/deductive/irrational>.
Irrational or Deductive. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/deductive/irrational.
Google Ngram Viewer shows how "deductive" and "irrational" have occurred on timeline