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

其奴[soitsu] that person (guy, fellow)
其処[soko] there (place relatively near listener)
其処いら[sokoira] that area
其処ら[sokora] everywhere
其方[sochira] that way (direction distant from the speaker, close to the listener)

其の[sono] that (something or someone distant from the speaker, close to the listener; actions of the listener, or ideas expressed or understood by the listener)
其の上で[sonouede] moreover
其の為[sonotame] hence
其の後[sonoato] after that
其の実[sonojitsu] in fact

彼処[asoko] there (place physically distant from both speaker and listener)
其処[soko] there (place relatively near listener)
其処いら[sokoira] that area
其処ら[sokora] everywhere
其れ処か[soredokoroka] on the contrary

何処其処[dokosoko] such-and-such a place
何処でも[dokodemo] anywhere
データ処理[deetashori] data processing
仮処分[karishobun] temporary measures
何処か[dokoka] somewhere