ocean

/ˈəʊ.ʃən/noun

One of the vast areas of salt water that lie between the continents.

Example sentence

“They sailed across the ocean for three weeks before reaching land.”

'Oceans of' is informal for plenty: oceans of time. Britons tend to say 'the sea' where Americans say 'the ocean'.

Related words

desertA dry, empty region with very little rain, water, or plant life.forestA large wild area thickly covered with trees and undergrowth, bigger than a woods.valleyA long, low stretch of land lying between hills or mountains, often with a river running along it.riverA large natural stream of water that flows across the land, usually emptying into a sea, lake, or another river.islandA piece of land, smaller than a continent, that has water on every side.mountainA very high, steep-sided mass of land that rises well above the surrounding area, usually with a narrow top.