沼地|ぬまちnumachi[0]heiban (flat)

1. nounmarshland; wetland; swampland
   沼地ぬまちに建物たてものは建たてられない。↗

   Swampy land is no use for building purposes.

• Synonym沼沢しょうたくWrittenWritten/formal prose. A collective term for marshes and swamps; more of a geographic term than 「沼地」.
• Synonym湿地しっちNeutralStresses damp ground and covers a broader range than 「沼地」; the usual choice in ecological contexts.
• Synonym沼ぬまNeutralStresses the small body of water itself rather than the land; also used figuratively for being hooked on something.
• Synonym沼沢地しょうたくちWrittenWritten/formal prose. Stresses waterlogged, muddy ground; in meaning it is equivalent to 「沼地」.
• Related湿原しつげんWrittenWritten/formal prose. Stresses grassland kept damp by freshwater, as in 「釧路湿原」.
• Related沼池NeutralNot a word in common use. Refers to bodies of water like marshes and ponds, stressing the water surface; 「沼地」 stresses the deep, damp muddy land.
• Related湿地草原NeutralWetland grassland: stresses wetland overgrown with grass, with the focus on the vegetation rather than the muddy ground.
• Antonym乾地WrittenWritten/formal prose. Dry ground with no standing water; the direct opposite of 「沼地」.

For swampy land deep in mud and damp, use 「沼地」. As a geographic term, say 「沼沢地」 or 「湿地」; for grassy wetlands, 「湿原」; for the small body of water itself, 「沼」. 「乾地」 is the opposite: dry ground.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 沼ぬまのように泥どろが深ふかくじめじめした土地とち。