Common sense
Common sense noun - The ability to make intelligent decisions especially in everyday matters.
Insanity
Insanity noun - A serious mental disorder that prevents one from living a safe and normal life.
Common sense is an antonym for insanity.
Both terms in one sentence
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For the platoon as a whole, we have Sergeant Hulka, the island of common sense in a sea of insanity keeping the platoon in line and on mission despite their incompetent commander.
Source: Film / Stripes - However, she is actually prone to moments of complete insanity, like kidnapping and torturing Big Howard's MacBook out of jealousy, and despite being the most book-smart person in the cast she has little common sense and almost no grip on reality.
Source: Women Are Wiser - Driven to Madness: In one strip Mr Spock is finally driven to insanity by the buffoonery and flagrant disregard for not only the rules but even common sense exhibited by Captain Kirk and the Enterprise crew.
Source: Webcomic / Slackerz
Cite this Source
Insanity and Common sense. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/common_sense/insanity
Common sense & Insanity. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/common_sense/insanity>.
Insanity or Common sense. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/common_sense/insanity.
Google Ngram Viewer shows how "common sense" and "insanity" have occurred on timeline