Plausible
Rational
Rational adjective - Based on sound reasoning or information.
Usage example: betting all of your savings on the lottery is not a rational move
Plausible is a synonym for rational in convincing topic. You can use "Plausible" instead an adjective "Rational", if it concerns topics such as credible.
Mutual synonyms
Both words in one sentence
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It's more than a bit of a stretch by the end, but a rational explanation is at least possible, if not quite plausible.
Source: Literature / The Exorcist -
When he asks Kel how he knew all the things he seemingly had no plausible way of knowing, Kel gives a rational, mundane reason for each one.Kenan: See, I knew there had to be a logical explanation to all this... 'cause a boy can't have extra mental abilities without having regular mental abilities!
Source: Series / Kenan & Kel - There are hints that supernatural things occur in Flores, but there are plausible rational explanations to almost all of them.
Cite this Source
Rational and Plausible. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/plausible/rational
Plausible & Rational. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/plausible/rational>.
Rational or Plausible. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/plausible/rational.
Google Ngram Viewer shows how "plausible" and "rational" have occurred on timeline