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

ユダヤ教会堂[yudayakyoukaidou] synagogue
位牌堂[ihaidou] mortuary chapel
一堂[ichidou] one building (hall, temple, shrine, room)
会堂[kaidou] church
会堂司[kaidouzukasa] ruler of a synagogue

議事堂[gijidou] Diet building
公会堂[koukaidou] town hall
講堂[koudou] auditorium
国会議事堂[kokkaigijidou] national parliament or congress building (e.g. National Diet (Japan), Capitol Hill (US), Houses of Parliament (UK), etc.)
参堂[sandou] visiting a home or a shrine