Here are some other terms that might describe such a valley:

* Gorge: Similar to a canyon, but often smaller and with a river flowing through it.

* Ravine: A smaller version of a canyon, often formed by a stream or river.

* Chasm: A deep, narrow gap or fissure in the earth.

* Crevice: A narrow crack or fissure in a rock face.

The specific term used will depend on the size, shape, and geological features of the valley.