Estuary and Lagoon

Estuary noun - A part of a body of water that extends beyond the general shoreline.

Lagoon and estuary are semantically related in nature topic. In some cases you can use "Lagoon" instead a noun "Estuary", when it comes to topics like body of water.

Lagoon noun - A body of water cut off from a larger body by a reef of sand or coral.

Estuary and lagoon are semantically related in body of water topic. You can use "Estuary" instead a noun "Lagoon".