Loony
Loony adjective - Showing or marked by a lack of good sense or judgment.
Usage example: that's got to be the looniest idea I've ever heard
Nearby Word: loon
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
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Smarter Than You Look: Harley may be a loony clown girl, but she's actually very smart and used to be a psychiatrist.
Source: Comicbook / Harley Quinn
Cite this Source
Smart and Loony. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/loony/smart
Loony & Smart. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/loony/smart>.
Smart or Loony. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/loony/smart.
Google Ngram Viewer shows how "loony" and "smart" have occurred on timeline