Hummock :: Hummock (n.) A rounded knoll or hillock; a rise of ground of no great extent, above a level surface..
Hummock :: Hummock (n.) A ridge or pile of ice on an ice field.
Hummock :: Hummock (n.) Timbered land. See Hammock.
Hummocking :: Hummocking (n.) The process of forming hummocks in the collision of Arctic ice.