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

水甕[mizugame] water jug
甕わ[mikawa] large earthenware pot (for brewing sake)
酒甕[sakagame] sake jug
甕菜[yousai] swamp morning glory (Ipomoea aquatica)

龍甕[ryuuga] imperial carriage
甕棺[kamekan] burial urn (often two-storey)
厨子甕[zushigame] decorated pottery container for storing the bones of one's ancestors (Okinawa)