圧し石[oshiishi] stone weight
一石[isseki] one game (of go)
一石二鳥[issekinichou] killing two birds with one stone
英国石油[eikokusekiyu] British Petroleum
下石[shitaishi] nether millstone

化粧石鹸[keshousekken] toilet soap
化石[kaseki] fossil
化石学[kasekigaku] paleontology
化石層[kasekisou] fossil bed
化石燃料[kasekinenryou] fossil fuel

化粧石鹸[keshousekken] toilet soap
石鹸[sekken] soap
石鹸水[sekkensui] soapy water
粉石鹸[konasekken] soap powder
逆性石鹸[gyakuseisekken] positive or antiseptic soap

石鹸入れ[sekkenire] soap dish or box
石鹸置き[sekkenoki] soap dish or box
石鹸箱[sekkenbako] soap dish or box
薬用石鹸[yakuyousekken] medicinal soap
石鹸の泡[sekkennoawa] soapsuds