Converse of subject

• surround: The island is three kilometers off the coast of Guam and is surrounded by a vast barrier reef.

Converse of object

• have: The east side of the island has the barrier reef as a back drop and is a mere stone's throw from the island.

Adjective modifier

• long: The barrier reef, which is 185 miles long, is the longest barrier reef in the Western Hemisphere.

Modifies a noun

• diorama: The upper deck five sailing vessels barrier reef aquatic dioramas.

• aquatic: The upper deck five sailing vessels barrier reef aquatic dioramas.

• system: Geologically they're extensions of one of the longest fringing barrier reef systems in the world.