Berserk
Berserk adjective - Frenzied as if possessed by a demon.
Usage example: berserk with grief
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
Mutual synonyms
Both words in one sentence
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With Great Power Comes Great Insanity: Ikkou doesn't go insane or berserk once he's manifested his super-powered side, but his libido goes into overdrive.
Source: Manga / Ah My Buddha -
In fact, he gets two — during "Utter Chaos" he changes color and goes to huge proportions, then in Dissidia 012 an Alternate Universe version of Chaos goes berserk and insane to become Feral Chaos.
Source: One Winged Angel / Square Enix - He also kept Max on a strict regiment of drugs designed to keep him from going berserk and insane.
Source: Designated Villain
Cite this Source
Insane and Berserk. (2016). Retrieved 2026, August 01, from https://thesaurus.plus/related/berserk/insane
Berserk & Insane. N.p., 2016. Web. 01 Aug. 2026. <https://thesaurus.plus/related/berserk/insane>.
Insane or Berserk. 2016. Accessed August 01, 2026. https://thesaurus.plus/related/berserk/insane.
Google Ngram Viewer shows how "berserk" and "insane" have occurred on timeline