See morass in Webster's New World Roget's A-Z Thesaurus II
noun
A usually low-lying area of soft waterlogged ground and standing water:
bog, fen, marsh, marshland, mire, muskeg, quag, quagmire, slough1, swamp, swampland, wetland. See drySomething that is intricately and often bewilderingly complex:
cat's cradle, entanglement, jungle, knot, labyrinth, maze, mesh (often used in plural), skein, snarl2, tangle, web. See simple
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