Body of water and Territorial waters

Body of water noun - The part of the earth's surface covered with water (such as a river or lake or ocean).

Territorial waters and body of water are semantically related. In some cases you can replace phrase "Territorial waters" with "Body of water", this phrases are similar.

Territorial waters noun - The waters surrounding a nation and its territories over which that nation exercises sovereign jurisdiction.

Body of water and territorial waters are semantically related. You can use "Body of water" instead a noun phrase "Territorial waters".