The pelagic zone is the part of the ocean that is not near the shore or the bottom. There are different synonyms that can be used to describe this part of the ocean. For example, the word "offshore" refers to the water that is located far away from the shore. Another synonym that can be used is "open ocean". This term refers to the vast and deep expanse of ocean water that is not close to land. "Deep sea" is another synonym that can also be used to describe the pelagic zone. This term refers to the part of the ocean that is located below the surface layer of water. Other synonyms include "oceanic zone" and "blue water".