Canyon
A Mountainous face
A group of mountain slopes in one area is called a mountain range.
A mountain area is called a range or mountain range. It is a series of connected mountains or hills in a line.
A plain
range
A rounded elevated area of land smaller than a mountain is called a hill.
foothills
An area of hills and mountains is called a mountain range.
fundus
Mt Rainier.
A rain shadow.