安全保障[anzenhoshou] security guarantee (e.g. military security, network security, etc.)
安全保障条約[anzenhoshoujouyaku] US-Japan Security Treaty
安保[anpo] US-Japan Security Treaty
医療保険[iryouhoken] medical-care insurance
火災保険[kasaihoken] fire insurance

火保ち[himochi] fire-holding qualities
過保護[kahogo] overprotective
確保[kakuho] guarantee
環境保護論者[kankyouhogoronsha] environmentalist
機密保護[kimitsuhogo] security (e.g. data, password, etc.)

曾遊[souyuu] former visit
曾て[katte] once
曾祖父[sousofu] great-grandfather
曾祖母[sousobo] great-grandmother
未曾有[mizou] unprecedented

曾孫[himago] great-grandchild
木曾川[kisogawa] river in Gifu Prefecture
伊曾保物語[isohomonogatari] Aesop's Fables (published initially by the Jesuits in 1593)
未だ曾て[imadakatsute] not until now (with neg. verb)