Insane
Insane adjective - Showing or marked by a lack of good sense or judgment.
Usage example: an insane plan to blow all of their savings on lottery tickets
Smart
Smart adjective - Having or showing quickness of mind.
Usage example: a smart child who will do well in school
Both words in one sentence
- The Cuckoolander Was Right: No matter how insane Mari's theories are, she's smart and genre savvy enough that they're usually right.
Source: Lets Play / Geek Remix - He would be the smart guy, but he's just too darn insane to function.The Butt MonkeyAstrid.
Source: Four-Man Band -
The Hobgoblin only turned to crime because he wasn't as smart as Norman, and thought Osborn had to be insane to use his amazing tech in the same way when he could easily make a fortune out of it.
Source: Comic Book / Norman Osborn
Cite this Source
Smart and Insane. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/insane/smart
Insane & Smart. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/insane/smart>.
Smart or Insane. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/insane/smart.
Google Ngram Viewer shows how "insane" and "smart" have occurred on timeline