Intelligent
Intelligent adjective - Having or showing quickness of mind.
Usage example: his intelligent response to the emergency averted a disaster
Rational is a synonym for intelligent in reasonable topic. In some cases you can use "Rational" instead an adjective "Intelligent", when it comes to topics like sensible, conscious, reason, judicious. popular alternative
Rational
Rational adjective - Having the ability to reason.
Usage example: human beings are rational creatures
Intelligent is a synonym for rational in sensible topic. You can use "Intelligent" instead an adjective "Rational", if it concerns topics such as reasonable, conscious, reason, logical. popular alternative
Mutual synonyms
Related pairs
- alert and intelligent
- alert and rational
- knowing and intelligent
- knowing and rational
- reasoning and intelligent
- reasoning and rational
- sensible and intelligent
- sensible and rational
- sound and intelligent
- sound and rational
- sane and intelligent
- sane and rational
- reasonable and intelligent
- reasonable and rational
Both words in one sentence
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Interestingly, these people also tend to be the most rational or intelligent in the group, perhaps because being socially timid is associated with bookworms.
Source: Shy Blue-Haired Girl -
On the other hand though, he's actually fairly rational and intelligent in a crisis.
- The series plays with this a lot, especially considering that almost all the characters are highly intelligent and rational.
Source: Straw Vulcan
Cite this Source
Rational and Intelligent. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/intelligent/rational
Intelligent & Rational. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/intelligent/rational>.
Rational or Intelligent. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/intelligent/rational.
Google Ngram Viewer shows how "intelligent" and "rational" have occurred on timeline