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

英語基礎能力試験[eigokisonouryokushiken] English Language Proficiency Test
基礎[kiso] foundation
基礎研究[kisokenkyuu] basic research
基礎工事[kisokouji] foundation works
基礎試験[kisoshiken] preclinical study

基礎知識[kisochishiki] fundamental knowledge
礎石[soseki] foundation stone
定礎式[teisoshiki] cornerstone (foundation stone) ceremony
定礎[teiso] laying a cornerstone (foundation stone)