Here are some other terms that could be used, depending on the specific characteristics of the valley:

* Gorge: Similar to a canyon, but often narrower and with steeper walls.

* Ravine: A smaller, shallower version of a canyon or gorge.

* Chasm: A very deep and narrow gorge, often with sheer cliffs.

* Crevice: A narrow crack or fissure in rock, often found in canyons or gorges.

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