hill Antonyms

mead ravine rut scissure sewer snowflake spillway steppe strath sulcus swale sward prairie pothole meadow moat niche ocean orchard paddock pampas pasturage pasture penstock plain trench trough tundra salt marsh nullah campo dene flatland gulley meadowland pediplain savannah shortgrass throated pastureland rangeland vale valley vega vena vineyard water meadow waterway cwm creek bed