You can use beach, coast, and shore to talk about the piece of land beside a stretch of water. A beach is a flat area of sand or pebbles next to the sea. The coast is the area of land that lies alongside the sea. You may be referring just to the land close to the sea, or to a wider area that extends further inland. The shore is the area of land along the edge of the sea, a lake, or a wide river.

beach, coast和shore都可以用来指大片水域的岸边陆地。beach是指海边的沙滩或碎石滩。coast是沿海陆地区域，既可以指紧靠海边的区域，也可以泛指沿海地区。而shore是指海洋、湖泊或宽广的河流的岸边陆地。