| Term | Definition |
| Bay | an arm of the sea, extending into the land, smaller than a gulf and larger than a creek |
| Bayou | a soggy, swampy, slow-moving body of water, obstructed by vegetation |
| Beach | a shore of the sea or of a lake, washed by the tide and waves |
| Bluff | a high bank, almost perpendicular, projecting into the sea |
| Blog | soft, wet ground covered with grass or other plants, too soft to bear a man |
| Branch | a smaller stream running into a larger one or proceeding from it |
| Altitude | the elevation of an object in relationship to a given plane, often sea level |
| archipelago | a body of water interspersed with many isles |
| arm | a long, narrow passage of water; a creek |
| atoll | a ring-shaped coral reef, island, or set of small islands nearly or completely surrounding a lagoon |
| bank | a steep slope of ground rising from a lake, a river, or the sea |
| basin | a hollow place for water; an enclosed part of water, forming a broad space within a strait or narrow entrance; a little bay |
