Geomorphology is the study of the Earth's surface and the processes that shape it. Geomorphic is an adjective used to describe the landforms and their features. Synonyms for geomorphic include geological, topographical, terrain-based, land-based, and earth-formed. The use of these synonyms depends on the context in which they are used. Geological is used when referring to the underlying rock formations that influence landforms. Topographical is used to describe the surface features and elevations of the land. Terrain-based is used when referring to the land's physical characteristics, such as slopes and inclines. Land-based is used to indicate the geographical location or the kind of features present. Earth-formed is used to emphasize the natural processes involved in shaping the land.