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

異洗浄[isenjou] stomach pumping
浄化[jouka] purification
浄水[jousui] clean water
浄水器[jousuiki] water filter
浄水場[jousuijou] water purification (filtering) plant

浄土[joudo] Pure Land (esp. the Western Pure Land paradise of Amitabha)
浄瑠璃[joururi] type of dramatic recitation accompanied by a shamisen (associated with the Japanese puppet theater)
浄い[kiyoi] clear
浄め[kiyome] purification
浄める[kiyomeru] to purify