marshEnglishOxford American Thesaurusmarsh noun swamp, marshland, bog, peat bog, swampland, morass, mire, quagmire, quag, slough, fen, fenland, wetland, sump; salt marsh, saltings, salina; North American bayou, pocosin, moor; Scottish, & Northern English moss; Irish corcass; archaic marish.word linksmarshpaludal relating to marshes