Back and forth they went, never seeming to hit a long, smooth patch, together or separately.

A black snake was sunning itself on a smooth patch of rock.

I pressed my ear to a smooth patch of hull.

On the surface of the water there was suddenly a smooth patch, as though a large fish had dived.

They circled low, searching for a smooth and level patch of ground on which to land.

Anybody walking but not looking wouldn't notice the smooth patches.

There's a smooth patch of what I hope's snow at the other end of town.

There was the occasional smooth patch of obviously new metal.

The new scar was a smooth patch of pink above her small breast.

A dark smooth patch in the lower right corner may be warm ice that recently welled up from below.