Starts with R
A place where water is collected and kept for use when wanted
Reservoir
Ocean surface level used as base for measuring elevation and sea depth; the average tide level
Sea level
A large body of water, nearly enclosed by land
Sea
The altitudinal border above which a mountain is always covered in snow
Snow line
Spongy land; low ground filled with water; soft, wet ground
Swamp
The slope of ground on the right hand side of the river when facing downstream
Right bank
A place where the water is shallow or if little depth; a sandbank or bar; a shallow
Shoal
The part or channel of a river by which its waters are discharged into the ocean or into a lake
River mouth
A small point of land running into the sea; a long, narrow shoal extending from the shore into the sea
Spit
A current of water like a river, brook, or rivulet; a current of water in the ocean
Stream
A chain or range of rocks, lying at or near the surface of the water
Reef
The coast or land adjacent to the sea, a large lake or a river
Shore
The beginning of a river; the headwaters
River source
The upper stratum of the Earth; the compound substance that furnishes nutriment to plants or which is particularly adapted to support and nourish them
Soil
A prairie; a grassy plane characterized by a lack of trees and a shortage of rain
Steppe
A large stream of water flowing in a channel on land tour, the ocean, a lake, or another river, larger than a brook
River
A harbor of the sea, accommodating seafaring vessels
Seaport
Narrow Ridge of fine particles of stone created by the current or tide
Sandbar
Any ground whose surface forms an angle with the plain of the horizon
Slope
The highest point of a mountain
Summit
A long or continued range of hills or mountains; the upper part of such a range
Ridge
The place where a body of water meets the land
Shoreline
An extensive open plane or meadow; a plain destitute of trees
Savanna
A narrow passage of water; a straight between the mainland and an isle ; a straight connecting to sea, or connecting a sea or lake with the ocean
Sound
A narrow pass or passage, either in a mountain or in the ocean, between continents or other portions of land
Strait