What is Another name for arete?

There isn't really another specific name for an arête, as it's a unique geological feature. However, you could use more descriptive terms depending on the context:

General terms:

* Knife-edge ridge: This emphasizes the sharp, narrow nature of an arête.

* Crest: A general term for the top of a ridge, though it doesn't specifically imply sharpness.

* Mountain spine: This term evokes the image of a long, thin ridge running along a mountain.

Specific terms:

* Glacial arête: This is used when you want to emphasize the role of glaciers in forming the arête.

* Cirque arête: This refers to an arête that forms the boundary between two cirques (bowl-shaped depressions).

Ultimately, the best alternative depends on the specific context and the aspect you want to emphasize.