wetland bog fen marsh slough swamp morass muskeg marshland mire moor moss slew swampland wash fenland fens lowland quagmire wetlands bogs morasses swamps mires sloughs quagmires muskegs moors washes slews bayous holms everglades swales polders glades mud sumps salinas lowlands carrs quicksand bogland bottomland peat estuaries sump quag carr bayou salina saltings floodplains deltas mudflats plains valleys flats shallows strands shoals branches feeders tributaries affluents creeks rivers streams backwaters brooks outlets wastelands desert waste desolation heath wilderness barrens wilds badlands voids breadth distance reaches stretches bush barrenness emptiness solitude extents spread expansion tundra lengths vastness brushes jungle expanses fields lagoons