seaboard       
noun [ C usually singular ] uk/ˈsiː.bɔːd/ us/ˈsiː.bɔːrd/
 海滨;海岸;沿海地区
the long, thin area of a country that is next to the sea
  The company owns a chain of hotels along/on the Atlantic seaboard. 这家公司在大西洋沿岸拥有连锁宾馆。 
 Synonym: coast