catchment area vs catchment basin

catchment area and catchment basin both are nouns.

Word	Noun	Adjective	Verb	Adverb
catchment area	Yes	No	No	No
catchment basin	Yes	No	No	No

As nouns, catchment area and catchment basin are synonyms defined as:

catchment area and catchment basin: the entire geographical area drained by a river and its tributaries; an area characterized by all runoff being conveyed to the same outlet

Other synonyms of catchment area include basin, drainage area, drainage basin, river basin, watershed.

catchment area (noun)	catchment basin (noun)
the entire geographical area drained by a river and its tributaries; an area characterized by all runoff being conveyed to the same outlet	the entire geographical area drained by a river and its tributaries; an area characterized by all runoff being conveyed to the same outlet