Oceanography
Sea Cave
Sea Arch
Sea Stack
Sea Cliff
Beach
Barrier Island
Barrier Reef
Inlet
Delta
Bay
Tombolo
Sand Spit
Lagoon
Manmade Jetty
Sea Wall
Longshore Bar
Island
Other
Barrier Reef-
Great Barrier Reef off Australia's Queensland
The same thing as a barrier island but they are formed from coral and they run parallel to the shoreline to produce a lagoon.