1. Informal or slang term for mentally irregular
   - balmy [archaic], barmy, bats, batty, bonkers, buggy [N. Amer], cracked, crackers, daft, dotty, fruity, haywire, kooky, kookie, loco, loopy, nuts, nutty, round the bend, around the bend, wacky, whacky

1. Someone deranged and possibly dangerous
   - crazy [N. Amer], looney, nutcase, weirdo, headcase

Derived forms: loonier, looniest

See also: insane, loon

Type of: lunatic, madman, maniac

Encyclopedia: Loony

• comb-plate
• combat
• combat area
• combat boot
• combat casualty
• combat ceiling
• combat fatigue
• combat injury
• combat intelligence
• combat mission
• combat neurosis
• combat pay
• combat pilot
• combat ship
• combat zone
• combat-ready
• combatant
• combative
• combatively
• combativeness
• combe
• combed
• comber
• combinable
• combination