Foolish
Foolish adjective - Showing or marked by a lack of good sense or judgment.
Usage example: a foolish scheme that was supposed to make us all rich
Insane is a synonym for foolish in ability topic. In some cases you can use "Insane" instead an adjective "Foolish", when it comes to topics like imprudent, nonsensical. popular alternative
Insane
Insane adjective - Having or showing a very abnormal or sick state of mind.
Usage example: only an insane person would intentionally jump off a skyscraper
Foolish is a synonym for insane in ability topic. You can use "Foolish" instead an adjective "Insane", if it concerns topics such as imprudent, stupid, senseless. popular alternative
Mutual synonyms
Both words in one sentence
- It's not just the taint that's making him insane, it's the knowledge that all of existence rests on his shoulders, while foolish people are fighting their savior at every turn.
Source: The Chosen One - He thanks them and realizes what he did was foolish, but then realizes that despite being insane and a coward, he had massive power over the world (Power is something all Wolverines pride above all else) which is now gone.
Source: Ignored Epiphany - Bored With Insanity: Nakor notes you can only be insane for so long and that he has owned his artifact for a very long time... Usually a foolish, fun-loving gambler, his light moods are broken up by amazing moments of insight.
Source: Literature / The Riftwar Cycle
Cite this Source
Insane and Foolish. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/foolish/insane
Foolish & Insane. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/foolish/insane>.
Insane or Foolish. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/foolish/insane.
Google Ngram Viewer shows how "foolish" and "insane" have occurred on timeline