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

異姓[isei] different surname
下姓[geshou] person of humble birth
改姓[kaisei] changing one's family name
旧姓[kyuusei] one's former (maiden) name
姓氏[seishi] full name

姓名[seimei] full name
種姓[sujou] birth
俗姓[zokushou] secular surname (of a priest)
他姓[tasei] another surname

御寝小[onesho] bed-wetting
小便をする[shoubenwosuru] to pee
悪戯小僧[itazurakozou] mischievous boy
右小括弧[migishoukakko] closing parenthesis
永小作[eikosaku] perpetual land lease

英小文字[eikomoji] lower-case letters
仮小屋[karigoya] booth
過小[kashou] too small
過小評価[kashouhyouka] underestimation
甘い小説[amaishousetsu] sentimental novel

アルカリ性[arukarisei] alkalinity
悪性[akushou] evil nature
悪性[akusei] malignancy
悪性リンパしゅ[akuseirinpashu] malignant lymphoma
悪性腫瘍[akuseishuyou] malignant tumor

悪性度[akuseido] malignancy
圧縮性[asshukusei] compressibility
圧迫性[appakusei] compression
安全性[anzensei] safety
安定性[anteisei] stability