沼田【ぬまた】
marshy rice field or paddy
泥沼【どろぬま】
bog, marsh, swamp, quagmire, morass, quandary, dire situation from which one cannot extricate oneself, imbroglio
沼地【ぬまち】
marshland, wetland, swampland
沼沢【しょうたく】
marsh, swamp, bog
湖沼【こしょう】
lake, marsh, wetland, inland waters