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

イ長調[ichouchou] A major
データビット長[deetabittochou] data bit length
ト長調[tochouchou] G major
ニ長調[nichouchou] D major
ハ長調[hachouchou] C major

ヘ長調[hechouchou] F major
ホ長調[hochouchou] E major
ロ長調[rochouchou] B major
委員長[iinchou] committee chairman
意味深長[imishinchou] with profound (often hidden) meaning

一隊[ittai] party
掩護部隊[engobutai] covering force
横隊[outai] rank
火力支援部隊[karyokushienbutai] fire support element
海兵隊[kaiheitai] Marine Corps

外国部隊[gaikokubutai] overseas (military forces)
格闘戦部隊[kakutousenbutai] shock troops
楽隊[gakutai] band
艦隊[kantai] (naval) fleet
機動隊[kidoutai] riot police