coast

n 1: the shore of a sea or ocean syn seashore, seacoast, sea-coast 2: a slope down which sleds may coast; "when it snowed they made a coast on the golf course"

3: the area within view; "the coast is clear" 4: the act of moving smoothly along a surface while remaining in contact with it; "his slide didn't stop until the bottom of the hill"; "the children lined up for a coast down the snowy slope" syn slide, glide

v : move effortlessly; by force of gravity

Source: WordNet. Princeton University