Fantastic and Rational

Opposite meaning words

Fantastic adjective - Conceived or made without regard for reason or reality.

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Rational is an antonym for fantastic in topics: unrealistic, strange.

Rational adjective - Having the ability to reason.

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Fantastic is an antonym for rational.

Fantastic Religious Weirdness: Caledony practices Rational Christianity, a bizarre mix of Calvinism and Objectivism in which the market is deliberately manipulated in order to make it "moral".

Source: Literature / Thousand Cultures

Cite this Source

Rational and Fantastic. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/fantastic/rational

Fantastic & Rational. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/fantastic/rational>.

Rational or Fantastic. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/fantastic/rational.

Google Ngram Viewer shows how "fantastic" and "rational" have occurred on timeline