brainiac /brāˈni-ak/ (N Am inf)

An exceptionally intelligent person

• iron horses
• ironic
• ironical
• ironically
• ironier
• ironies
• ironiest
• ironing
• ironing-board
• ironing-boards
• ironings
• ironise
• ironised
• ironises
• ironising
• ironist
• ironists
• ironize
• ironized
• ironizes
• ironizing
• ironlike
• iron-liquor
• iron lung
• iron lungs