Synonyms of the word

berserk

• n. A crazed Norse warrior who fought in a frenzy; a berserker.
• adj. Injuriously, maniacally, or furiously violent or out of control.
• adj. weird; strange.

amok

• adv. Out of control, especially when armed and dangerous.
• adv. In a frenzy of violence, or on a killing spree; berserk.
• n. One who runs amok; in Malay and Moro/Philippine culture, one who attempts to kill many others, especially…

amuck

• adv. In a frantic or frenzied and violent manner; in a confused, jumbled or uncontrolled state.

berserker

• n. A berserk (a crazed Norse warrior who fought in a frenzy).
• n. One who fights as if frenzied, like a berserker.
• n. (science fiction) A type of von Neumann probe whose mission is to exterminate alien lifeforms.

demoniac

• adj. possessed or controlled by a demon.
• adj. Of or pertaining to demons; demonic.
• n. Someone who is possessed by a demon.

demoniacal

• adj. Pertaining to, characteristic of, or produced by a demon or evil spirit; devilish or fiendish.

insane

• adj. Exhibiting unsoundness or disorder of mind; not sane; mad; deranged in mind; delirious; distracted.
• adj. Used by, or appropriated to, insane persons.
• adj. Causing insanity or madness.
• adj. Characterized by insanity or the utmost folly; ridiculous; unpractical.

possessed

• v. simple past tense and past participle of possess.
• adj. controlled by evil spirits.
• adj. Seized by powerful emotions.
• adj. (construed with of, not comparable) Having; owning.