Coasting is a term used to describe a variety of activities that involve moving downhill without the use of any power source. Freewheeling, which is 12 letters long, is a type of coasting that involves riding a bicycle or skateboard without pedaling. SLED, which is 4 letters long, is another type of coasting that involves sliding down a hill on a SLED. Lugeing, which is 7 letters long, is a type of coasting that involves lying on a SLED and racing down a track. Finally, whee, which is 4 letters long, is an expression of joy often used when coasting down a hill.