汚染源[osengen] source of pollution
音源[ongen] sound source
禍源[kagen] source of misfortune
供給源[kyoukyuugen] source of supply
経営資源[keieishigen] management resource

源氏物語[genjimonogatari] the Tale of the Genji
源泉[gensen] source
源流[genryuu] current-limiting
語源[gogen] word root

運輸省[unyushou] Ministry of Transport
外務省[gaimushou] Ministry of Foreign Affairs
各省[kakushou] each ministry
冠省[kanshou] Forgive me for dispensing with the preliminaries, but I hasten to inform you that...
帰省[kisei] homecoming

教育省[kyouikushou] Department of Education
省みる[kaerimiru] to look back (e.g. over shoulder or at the past)
厚生省[kouseishou] Ministry of Health and Welfare (now Ministry of Health, Labour and Welfare)
国防総省[kokubousoushou] National Military Establishment
国務省[kokumushou] State Department

隠匿物資[intokubusshi] concealed materials
運転資金[untenshikin] working capital
英資[eishi] brilliant qualities
海外投資[kaigaitoushi] overseas investment
外国投資家[gaikokutoushika] foreign investor

外資[gaishi] foreign capital (e.g. in a company)
学資[gakushi] school expenses
巨資[kyoshi] large capital
軍資[gunshi] war materiel
軍資金[gunshikin] war funds