Here are some other terms that could be used, depending on the specific geography:

* Intermontane valley: A valley formed between mountains.

* Interfluve: A high area between two river valleys.

* Pass: A low point in a mountain range that allows passage.

* Depressions: A low-lying area of land, often with no clear drainage pattern.

* Basin: A low area surrounded by higher ground, often containing a body of water.

Let me know if you'd like more information on any of these terms!