Basin and Catchment

Basin noun - A bowl-shaped vessel; usually used for holding food or liquids.

Catchment and basin are semantically related in drainage basin topic. In some cases you can use "Catchment" instead a noun "Basin", when it comes to topics like drainage area.

Catchment noun - A structure in which water is collected (especially a natural drainage area).

Basin and catchment are semantically related in drainage basin topic. You can use "Basin" instead a noun "Catchment", if it concerns topics such as drainage area.