お冷[ohiya] cold (drinking) water
花冷え[hanabie] chilly spring weather
寒冷[kanrei] cold
興冷め[kyouzame] kill-joy
空冷[kuurei] air cooling

空冷式[kuureishiki] air-cooled
水冷式[suireishiki] water-cooled
頭を冷やす[atamawohiyasu] to cool down one's anger
保冷[horei] keep cool

ひと塊[ikkai] one lump
塊根[kaikon] tuberous root
塊状[kaijou] massive
凝塊[gyoukai] clot
金塊[kinkai] nugget

集塊[shuukai] agglomerate (e.g. of cells, molecules, etc.)
団塊の世代[dankainosedai] baby boom generation
土塊[dokai] lump of earth
肉塊[nikukai] piece of meat
氷塊[hyoukai] lump of ice

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