Synonyms for ocean

sea, great sea, high seas, salt water, seashore, seaside, beach, shores, Oceanus, Neptune, the mighty deep, the main, the great waters, the Seven Seas, mare, big pond*, puddle*, briny deep*, Davy Jones' locker*, the cradle of the deep*; see also sea.

Oceans of the world include: Atlantic, Pacific, Arctic, Antarctic, Indian, North Atlantic, South Atlantic, North Pacific, South Pacific.