Mountain Stream
Swamp
noun
さわ
沢 (さわ) Mountain Stream, Swamp
渓流 (けいりゅう) Mountain Stream
沼沢 (しょうたく) Swamp, Marsh
沼 (ぬま) Bog, Swamp
泥沼 (どろぬま) Quagmire, Bog, Morass
沼地 (ぬまち) Marshland, Wetland, Swampland
湿地 (しっち) Wetlands
騒ぐ (さわぐ) To Make Noise, To Be Boisterous, To Make A Fuss
Google Images only shows Mountain Streams.
Swamp さわ(んぷ)