較優位論[kakuyuuiron] theory of comparative advantage
見優り[mimasari] compare favourably
公益優先[kouekiyuusen] public interest first
航空優勢[koukuuyuusei] air superiority
射撃の優先順位[shagekinoyuusenjuni] priority of fires

女優[joyuu] actress
乗降車優先[joukoushayuusen] priority to pedestrians
声優[seiyuu] voice actor or actress (radio, animation, etc.)
全優[zenyuu] straight A's
男優[danyuu] actor

偏芯[henshin] eccentricity (in mechanics, electronics, etc.)
燈芯[toushin] (lamp) wick
帯芯[obishin] thick obi sash
摘芯[tekishin] thinning (buds and branches)
芯地[shinji] padding

替え芯[kaeshin] spare lead
鉛筆の芯[enpitsunoshin] lead of a pencil
硬の芯[kounoshin] hard pencil lead
林檎の芯[ringonoshin] core of an apple