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

一炊の夢[issuinoyume] an empty dream
共同炊事場[kyoudousuijiba] community kitchen
雑炊[zousui] rice gruel containing vegetables, fish, etc., and seasoned with miso or soy sauce
自炊[jisui] cooking for oneself
水炊[mizutaki] food (esp. chicken and vegetables) boiled in plain water (or sometimes dashi, etc.) and served with dipping sauce (esp. ponzu)

炊き込み[takikomi] (something) cooked with rice
炊き込む[takikomu] to cook (something) with rice
炊事[suiji] cooking
炊飯器[suihanki] rice cooker
炊出し[takidashi] emergency rice feeding