This happens every day, such as when a small excavation in a valley can bring down the whole mountainside (landslide).

"We'll find it if we have to blast open this whole mountainside!"

We haven't had any rain in months, and this whole mountainside could have gone up.

We'll comb the whole mountainside to look for any hidden chests.

"A couple more like that, and-" The whole mountainside under the building seemed to tilt.

We're stuck in the only crevice along this whole mountainside.

"if that goes, it'll avalanche the whole mountainside and maybe take us and everything into the valley along with it!"

It was as if the whole mountainside were speaking.

Unless you have a whole mountainside, however, these plants are too big for rock gardens.

The whole mountainside had been gouged out in a series of encircling terraces, like steps.