Estuary and Fenland

Estuary noun - A part of a body of water that extends beyond the general shoreline.

Fenland and estuary are semantically related. In some cases you can use "Fenland" instead a noun "Estuary".

Fenland noun - Low-lying wet land with grassy vegetation; usually is a transition zone between land and water.

Estuary and fenland are semantically related. Sometimes you can use "Estuary" instead a noun "Fenland".