Landforms

A landform is a natural or anthropogenic land feature on the solid surface of the Earth or other planetary body.

Features
Def. the "cast or structure of anything, or of any part of a thing, as of a landscape, a picture, a treaty, or an essay; any marked peculiarity or characteristic" is called a feature.

Lands
Def. the "part of Earth which is not covered by oceans or other bodies of water" or an area of ground that is a part of the Earth's or other planetary body's solid surface is called land.

Landscapes
Def. a "portion of land or territory which the eye can comprehend in a single view, including all the objects it contains" is called a landscape.

Theoretical landforms
Def. each continuous surface of a landscape that is observable in its entirety and has consistence of form or regular change of form or any "geomorphological [geological] feature, such as a mountain or valley" is called a landform.

Resources

 * Continental shelves
 * Geomorphology
 * Glaciers
 * Hydrogeomorphology
 * Radiation astronomy/Craters
 * Radiation astronomy/Visuals
 * Rocks/Rocky objects