Synonyms of the word

maniacal

• adj. Like a maniac; insane; frenzied.

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.

maniac

• n. An insane person, especially one who suffers from a mania.
• n. A fanatic, a person with an obsession.