A coastal region is an area of land that borders the sea or ocean. The term 'Riviera' (7 letters) refers to a coastal region along the Mediterranean Sea, while 'LITTORAL' (8 letters) is a term used to describe the shoreline of any large body of water. 'SEABOARD' (8 letters) is another term for a coastal region, and 'Tidewater' (9 letters) is a specific type of coastal region that is affected by the tides. Finally, 'SEASIDE' (7 letters) is a term used to describe a coastal region that is close to the sea.