A plain is a flat landform, like you can see in the Midwest. Mountains are huge and steep.
bush plain
The opposite of plain (ordinary) could be fancy or ornate. The opposite of plain (unflavored) could be flavored, seasoned, or spicy. The opposite of plain (a prairie) could be hills, mountains, or plateaus. The opposite of plain (average) could be special, extraordinary, or uncommon. The opposite of plain (in appearance) could be handsome, pretty, attractive, or beautiful. The opposite of plain (obvious) could be hidden, disguised, secret, or private.
A desert can include a plain, a mountain, plateaus, valleys - almost any landform imaginable.
Rocky mountain
A large piece of flat land is called a plain. A mountain desert refers to a desert area with significant mountainous terrain.
All; Mountain Plain, desert plain, and bay.
Both a plain and a mountain are geographic features found on Earth's surface. However, they differ in terms of elevation and topography, with a plain being a flat, low-lying area, while a mountain is a large landform that rises steeply from its surroundings.
plain
plain
plain
Usually a valley or a plain.
a plain