Answer:

FEN

Answer	Crossword Clue
FEN	Swampland
FEN	Quagmire
FEN	Marsh

FEN	Peat's place
FEN	Swamp
FEN	Wetland
FEN	Boggy area
FEN	Soggy ground
FEN	Low wetland
FEN	Marshy land
FEN	Marshland

FEN	Waterlogged lowland
FEN	Boggy locale
FEN	Marshy area
FEN	Squishy lowland
FEN	Bog
FEN	Morass
FEN	Boggy land
FEN	Everglade

FEN	Boggy lowland
FEN	Watery lowland
FEN	Place to see reeds
FEN	Swampy area
FEN	Waterlogged land
FEN	Spongy ground
FEN	Swampy ground
FEN	Duck habitat

FEN	Low land
FEN	Soggy, boggy spot
FEN	Swampy place
FEN	Cattail habitat
FEN	Heron hangout
FEN	Peat source
FEN	Peat-forming wetland
FEN	Rushes home

FEN	Marshy region
FEN	Low land, under water.
FEN	Bog.
FEN	Forbid, in playing marbles.
FEN	Swamp.

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.