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

一旬[ichijun] ten days
下旬[gejun] month (last third of)
五旬節[gojunsetsu] pentecost
旬外れ[junhazure] off-season

旬刊[junkan] published every ten days
旬月[jungetsu] month and ten days
旬日[junjitsu] ten-day period
旬報[junpou] ten-day report