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

湧き出す[wakidasu] to gush out
湧き上る[wakiagaru] to boil up
湧き起る[wakiokoru] to well up
湧き出る[wakideru] to gush forth
湧く[waku] to well (up)

降って湧く[futtewaku] to happen suddenly
湧出[yuushutsu] gushing out
湧き水[wakimizu] spring water
湧出量[yuushutsuryou] output
湧水[yuusui] spring