Body of water and High sea

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

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

High sea noun - The open seas of the world outside the territorial waters of any nation.

Body of water and high sea are semantically related. You can use "Body of water" instead a noun phrase "High sea".