From Longman Dictionary of Contemporary Englishmarshlandmarsh‧land /ˈmɑːʃlænd $ ˈmɑːrʃ-/ noun [uncountable] SGDNan area of low wet ground that is always soft → fen
Examples from the Corpus
marshland• In the countryside, large working farms interrupted a landscape of mountains, meadow, marshland, and abandoned quarries.• He bought the light and many acres of marshland and salting surrounding it.• These conditions are best met in low-lying areas that were once marshland, and which still lie above a plentiful water table.• Most of the surrounding marshland had fallen to the crippling infection.• It declined by slow attrition, rather than On the grand scale of its swarming marshland relatives.• But I had a vision that led me straight through the marshland like a fledged arrow to its mark.• Farms on the Fens today have all the crops grown in East Anglia, but the Fens was once a vast marshland.• The North Star was rolling past the wooded marshland on the northern part of the island to the Jurong Road. 