floodplain

As nouns the difference between estuary and floodplain

is that estuary is coastal water body where ocean tides and river water merge while floodplain is an alluvial plain that may or may not experience occasional or periodic flooding.

As nouns the difference between taxonomy and floodplain

is that taxonomy is the science or the technique used to make a classification while floodplain is (geography) an alluvial plain that may or may not experience occasional or periodic flooding.

As a noun floodplain

is an alluvial plain that may or may not experience occasional or periodic flooding.

As an adjective overbank is

describing sediments deposited on a floodplain from suspensions in floodwaters.

As nouns the difference between floodplain and bottomland

is that floodplain is an alluvial plain that may or may not experience occasional or periodic flooding while bottomland is flat land along a river, lying few feet above normal high water, often consisting of alluvial deposits and naturally fertile.