Abyss, Aqueduct, Beck, Bed, Bottom, Bottoms, Branch, Breach, Break, Brook, Burn, Canal, Canyon, Cavity, Channel, Chap, Chasm, Check, Chimney, Chink, Cleft, Col, Couloir, Crack, Cranny, Creek, Crevasse, Crevice, Crick, Culvert, Cut, Dale, Defile, Dell, Dingle, Ditch, Donga, Draw, Excavation, Fault, Fissure, Flaw, Fracture, Fresh, Furrow, Gap, Gape, Gash, Gill, Glen, Gorge, Groove, Grove, Gulf, Gully, Hole, Incision, Joint, Kill, Kloof, Leak, Midstream, Moat, Notch, Opening, Pass, Passage, Race, Ravine, Rent, Rift, Rime, River, Rivulet, Run, Rupture, Seam, Slit, Slot, Sluice, Split, Stream, Trench, Trough, Vale, Valley, Void, Watercourse, Waterway, Waterworks