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Depends on your location. From the Caribbean perspective, the hierarchy from largest to smallest is Basin, Watershed, Catchment.
Drainage or River Basin: A river basin or drainage basin is a portion of land drained by a river and its tributaries. A river basin sends all the water falling in the surrounding land into the river.
Watershed: A watershed is simply the area of land that catches rain and snow and drains or seeps into a marsh, stream river, lake or groundwater.
Catchment area - the entire geographical area drained by a river and its tributaries; an area characterized by all runoff being conveyed to the same outlet.