1) Fen 1) Manatee habitat 2) Marshy tract of land 3) Swampland 4) Swampy tract 
• (n.) A swamp or low tract of land inundated with water and interspersed with hummocks, or small islands, and patches of high grass; as, the everglades of Florida.
Ev`er·glade noun A swamp or low tract of land inundated with water and interspersed with hummocks, or small islands, and patches of high grass; as, the everglades of Florida. [ U. S.]
a tract of low, swampy land, esp. in southern Florida, characterized by clumps of tall grass and numerous branching waterways.