沢【さわ】
mountain stream, valley, dale, wetlands, swamp, marsh
光沢【こうたく】
brilliance, polish, lustre, luster, glossy finish (of photographs)
贅沢【ぜいたく】
luxury, extravagance, to live in luxury, to indulge oneself, lavish (use of something), abundant, copious, wasteful, excessive (e.g. demands, expectations)
沢山【たくさん】
a lot, lots, plenty, many, a large number, much, a great deal, a good deal, enough, sufficient, enough, too many, too much
沼沢【しょうたく】
marsh, swamp, bog