valley Synonyms

rift valley slade scissure rille ravine plain pit pass notch lowland kloof hollow hole heugh gully gulf strath swale trench dene floodplain mudflat nullah bottomland coastal plain cwm cavitied alluvial plain water meadow void valleys vale tulip trough gulch gorge coombe coomb concavity combe col clough cirque chasm channel cavity canyon bottom basin barranca