bay,cay, ria, voe,
A cove, inlet, or bay.
A small bay can be called an inlet. A large bay is a gulf. The opposite of a bay is a peninsula.
Some places call them a 'Cut'. The inlet to Miami, FL is called, Government Cut.A Ria is a narrow coastal inlet
Another name for coastal plains
Another name for coastal plain is Terra Firma.
Answer: Coastal Plain (Tidewater)
The Coastal Plain region is also known as the Atlantic Coastal Plain.
fjord Another name is a ria
Perhaps the word you're looking for is "inlet".
A 13-letter answer is martellotower.
inlet
Chesapeake bay or Coastal plain