dumbo /dumˈbō/ (informal)

A dimwit

• fours
• fourscore
• fourscorth
• four-seater
• four-seaters
• fourses
• foursome
• foursomes
• four-square
• four-stroke cycle
• fourteen
• fourteener
• fourteeners
• fourteens
• fourteenth
• fourteenthly
• fourteenths
• fourth
• fourth dimension
• fourth-dimensional
• fourth estate
• Fourth International
• fourthly
• fourth official
• fourth officials