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

黄禍[kouka] Yellow Peril
禍因[kain] cause of trouble
禍害[kagai] evil
禍源[kagen] source of misfortune
禍根[kakon] root of evil

禍福[kafuku] weal and woe
豪雨禍[gouuka] flood devastation
災禍[saika] accident
惨禍[sanka] calamity