Here are some other terms that might be used, depending on the specific terrain:

* Downslope: This is a more general term for the direction of descent.

* Hillside: Used for a gentler slope.

* Mountainside: Used for a steeper slope on a mountain.

* Valley: This is a wider, lower area between mountains.

* Canyon: A deep, narrow valley, often with steep sides.

The best term depends on the specific context and the shape of the mountain.