What characteristic differentiates a watershed from a drainage basin?

While the terms are often used interchangeably, the primary differentiating characteristic is scale and context. Both a watershed and a drainage basin refer to an area of land where all water that falls on it drains to a common outlet, such as a river, lake, or ocean. However, 'watershed' is typically used to describe a smaller, more localized area, while 'drainage basin' refers to a larger area encompassing multiple watersheds. A drainage basin is a ....