waterbody-bed As a command 9 categories below waterbody-bed Narrow by geological-formation 5 natural-object 4 ocean-floor 4 place 4 landform 3 body-of-water 1 land 1 pelagic-zone 1 plain 1 streambed 1 ocean-floor 4streambed 1abyssal-plainabyssal-zonecontinental-shelfcontinental-slopeerosive-washlake-bedriverbed