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

口辺単純疱疹[kouhentanjunhoushin] cold sore
純愛[junai] pure love
純益[juneki] clear profit
純化[junka] purification
純金[junkin] pure gold

純潔[junketsu] purity
純血[junketsu] pure-bred (usu. animal)
純情[junjou] pure heart
純真[junshin] purity
純粋[junsui] pure