dale, vale;
hollow, depression, hole, basin, gully, gorge, pass, ravine, canyon, rift, gap;
British combe, slade, dene;
Northern English clough;
Scottish glen, strath;
Indian nullah;
South African kloof;
Spanish vega;
in Arabic-speaking countries wadi;
literary dell, dingle.
EnglishOxford English Thesaurus
