Four wheel drive, also known as 4WD, is commonly used to describe a vehicle that delivers power to all four wheels. However, there are several other synonyms that can be used to describe the same thing. Some of the most common include all-wheel drive (AWD), four by four (4x4), and four wheel traction control (4WTC). Each of these terms refers to a vehicle that distributes engine power to all four wheels, allowing it to maintain traction and control on a variety of terrains. Other less common synonyms for four wheel drive include quadtrac, full-time 4WD, and four wheel grip control.