御中[onaka] stomach
御話中[ohanashichuu] busy (phone)
アル中[aruchuu] alcoholism
π中間子[paichuukanshi] pi meson
暗中[anchuu] in the dark

暗中摸索[anchuumosaku] groping in the dark
意中[ichuu] one's mind
意中の女[ichuunoonna] sweetheart
井の中の蛙大海を知らず[inonakanokawazutaikaiwoshirazu] parochial
一日中[ichinichijuu] all day long

迦楼羅[karura] Garuda or Garua (man-bird deity and 'vahana' of Hindu-Buddhist myth)
画楼[garou] high decorated building
空中楼閣[kuuchuuroukaku] castle in the air
高楼[kourou] lofty (high) building
鐘楼[shourou] belfry

摩天楼[matenrou] skyscraper
楼閣[roukaku] multistoried building
楼門[roumon] two-storied gate
蜃気楼[shinkirou] mirage
望楼[bourou] watchtower

空オケ[karaoke] karaoke (singing to taped accompaniment)
ベクトル空間[bekutorukuukan] vector space
茜さす空[akanesasusora] glowing sky
圧搾空気[assakukuuki] compressed air
圧縮空気[asshukukuuki] compressed air

位相空間[isoukuukan] phase space (physics)
宇宙空間[uchuukuukan] outer space
雨空[amazora] rainy sky
英国航空[eikokukoukuu] British Airways
仮想空間[kasoukuukan] virtual space (e.g. in computer graphics)

閣下[kakka] your Excellency
閣外[kakugai] outside the Cabinet
閣議[kakugi] cabinet meeting
閣僚[kakuryou] cabinet ministers
閣僚レベル[kakuryoureberu] cabinet-level

空中楼閣[kuuchuuroukaku] castle in the air
組閣[sokaku] formation of a cabinet
単独内閣[tandokunaikaku] one-party cabinet
中間内閣[chuukannaikaku] interim cabinet
天守閣[tenshukaku] castle tower