Irrational
Irrational adjective - Not using or following good reasoning.
Usage example: it's irrational to think that you can continue to consume an excess of calories and not gain weight
Nearby Words: irrationality, irrationally
Rational
Rational adjective - Having the ability to reason.
Usage example: human beings are rational creatures
Both words in one sentence
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At least some of their irrational standards might be made up on the spot, or are actually rational standards but not clearly voiced.
Source: Video Game / Façade - Double subverted by pretty much every human ever, who either is irrational, doesn't accept that the other side is rational, or both.
Source: Agree to Disagree - For Augustine, this is because God is perfectly rational, and is also perfect, and being perfect would not act contrary to His nature, which is to be rational, and since such paradoxes are irrational He can't do them.
Source: The Omnipotent
Cite this Source
Rational and Irrational. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/irrational/rational
Irrational & Rational. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/irrational/rational>.
Rational or Irrational. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/irrational/rational.
Google Ngram Viewer shows how "irrational" and "rational" have occurred on timeline