2 Words to use with hollowest

Ungenerous nature but endows These acres with the stumps and stocks Which should be trees, with rude, gray rocks; Over these humps and hollows browse, Daily, the awkward, shambling cows.

Up the gulch cow bells tinkled, up the hill birds sang, and through the little hollows twilight flowed like a vapour.

2 Words to use with  hollowest