Goober is a term used to refer to groundnuts, peanuts, and earthnuts. It is also sometimes used as a slang term for an IDIOT or fool. Groundnuts are a type of legume that grows underground and is often referred to as a PEANUT. Peanuts are a type of legume that grows above ground and is commonly eaten as a snack. Earthnuts are a type of nut that grows in the ground and is often used in cooking. Peas are a type of legume that grows above ground and is often eaten as a vegetable. All of these terms can be used interchangeably to refer to the same thing.