Synonyms of the word

moonstruck

• adj. (obsolete) Crazy or insane when affected by the phases of the Moon.
• adj. (by extension) Showing irrational behaviour, especially of a romantic or sentimental nature.
• adj. (obsolete) Made sick, or (like fishes) unsuitable for food, by the supposed influence of the Moon.

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.

lunatic

• n. An insane person.
• adj. crazed, mad, insane, demented.