sump (n.)
- bog
- bottom
- bottomland
- bottoms
- cesspool
- cistern
- cloaca
- dam
- dike
- drain
- dump
- fen
- fenland
- fishpond
- glade
- gutter
- holm
- kennel
- lagoon
- laguna
- lake
- linn
- loch
- lough
- marsh
- marshland
- meadow
- mere
- millpond
- mire
- moor
- moorland
- morass
- moss
- mud
- nyanza
- plash
- pond
- pool
- puddle
- quag
- quagmire
- quicksand
- reservoir
- salina
- scupper
- sewer
- sink
- slough
- sluice
- swale
- swamp
- swampland
- tank
- tarn
- wallow
- wash
- well
