悪水[akusui] undrinkable water
井戸水[idomizu] well water
一衣帯水[ichiitaisui] (being separated only by a) narrow strip of water
一水[issui] current (of water)
溢水[issui] inundation

飲水量[insuiryou] amount of drinking
飲料水[inryousui] drinking water
烏の行水[karasunogyouzui] quick bath
雲水[unsui] itinerant priest
塩化水素[enkasuiso] hydrogen chloride

火口湖[kakouko] crater lake
湖沼[koshou] lakes and marshes
湖上[kojou] on the lake
湖水[kosui] lake
湖畔[kohan] lake shore

湖面[komen] lake surface
江湖[kouko] the public
人造湖[jinzouko] artificial lake
中禅寺湖[chuuzenjiko] Lake Chuzenji