The term VAST QUANTITIES can be summarized by two crossword solutions: OCEANS (6 letters) and SEAS (4 letters). OCEANS are the largest bodies of water on Earth, covering more than 70% of its surface. They are divided into four main OCEANS: the Pacific, Atlantic, Indian, and Arctic. Seas are smaller bodies of saltwater that are partially enclosed by land. They are usually found along the coasts of continents and are connected to the ocean.