Atoll and Reef

Atoll noun - An island consisting of a circular coral reef surrounding a lagoon.

Reef is a synonym for atoll in island topic. In some cases you can use "Reef" instead a noun "Atoll".

Reef noun - A submerged ridge of rock or coral near the surface of the water.

Atoll is a synonym for reef in ridge topic. You can use "Atoll" instead a noun "Reef", if it concerns topics such as shoal, underwater or partially submerged ledge. popular alternative

Nearby Words: reefed, reefer, reefy, reefing