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

遠雷[enrai] distant thunder
機雷[kirai] (sea) mine
機雷原[kiraigen] minefield
魚雷[gyorai] torpedo
魚雷艇[gyoraitei] torpedo boat

仕掛地雷[shikakejirai] booby trap
疾風迅雷[shippuujinrai] with lightning speed
襲雷[shuurai] lightning strike
人工雷[jinkourai] artificial lightning
迅雷[jinrai] thunderclap