Cases of word usage

1) a light on a hill or mountain, or on the coast etc to give warning of danger to planes, ships etc (beacon)

2) of, near, the coast (coastal)

3) an outline (of a coast etc) (contour)

4) a narrow inlet of water on the coast or in a river-bank (creek)

5) a low area of loose, dry sand near the coast (dune)

6) a long, narrow inlet of the coast between high cliffs or mountains, especially in Norway (fjord)

7) a length of coast in a warm country that is popular for holidays (riviera)