A wheel cover is an item used to protect the wheels of a vehicle. It can be made up of four parts: a TYRE (4 letters), a hubcap (6 letters), a FENDER (6 letters) and a TIRE (4 letters). A TYRE is a rubber covering that fits around the rim of the wheel, while a hubcap is a metal or plastic cover that fits over the centre of the wheel. A FENDER is a metal or plastic covering that fits around the outside of the wheel, and a TIRE is a rubber covering that fits around the entire wheel.