Intelligent
Intelligent adjective - Having or showing quickness of mind.
Serious and intelligent are semantically related. In some cases you can use "Serious" instead an adjective "Intelligent".
Serious
Serious adjective - Not joking or playful in mood or manner.
Intelligent and serious are semantically related. Sometimes you can use "Intelligent" instead an adjective "Serious".
Nearby Words: seriously, seriousness
Mutual synonyms
Both words in one sentence
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On the other hand, he acts a lot less serious/intelligent than the rest of Roy's crew.
Source: Fat Idiot -
Amnesiac Dissonance Grune, an intelligent and serious goddess is rendered a Cloudcuckoolander by her amnesia.
Source: Video Game / Tales of Legendia -
In the show, Renly is the complete opposite: a serious and intelligent man who hates bloodshed and must be convinced to seek the throne because he'll make a better ruler.
Source: Adaptation Personality Change
Cite this Source
Serious and Intelligent. (2016). Retrieved 2026, August 03, from https://thesaurus.plus/related/intelligent/serious
Intelligent & Serious. N.p., 2016. Web. 03 Aug. 2026. <https://thesaurus.plus/related/intelligent/serious>.
Serious or Intelligent. 2016. Accessed August 03, 2026. https://thesaurus.plus/related/intelligent/serious.
Google Ngram Viewer shows how "intelligent" and "serious" have occurred on timeline