An extensive tract of land, mostly level, destitute of trees and covered with tall, course grass
A moving swell or volume of water; usually a swell raised and driven by wind and currents
A fast-moving river current, caused by a moderate descent
A vast treeless plain in the arctic region in which the ground is perpetually frozen
The coast or land adjacent to the sea, a large lake, or a river
A place where the water is shallow or of little depth; a sand bank or bar; a shallow
A mixed woodland-grassland ecosystem characterised by the trees being sufficiently, widely spaced so that the canopy does not close
The opening or entrance of a cave, pit, well, river, or den
A very steep side of a high rock, mountain, or cliff
A port, harbor, or town accommodating seagoing vessels
A fall or perpendicular descent of the water of a river or stream; a cascade of moving water
The upper part of such a long or continued range of hills or mountains
A large, thick collection of trees; a forest
A powerful circular current or vortex of water, usually produced by conflicting tidal currents or by eddying at the foot of a waterfall
A body of water flowing downhill on land by the force of gravity toward the ocean, a lake, or another river; larger than a brook
Small fertile area in a dry, arid region irrigated by natural springs to other source of fresh water
The vast body of wter that covers more than 3/5 of the surface of the globe, also called the sea
Wood that is proper for building or for tools, utensils, furniture, ships, and the like
The top of a hill or mountain, ending in a point
The highest point of a mountain
A chain or range of rocks or coral, lying at or near the surface of the water