一廓[ikkaku] one block
外廓[gaikaku] outer wall (e.g. castle)
城廓[joukaku] fortress
遊廓[yuukaku] red light district

輪廓[rinkaku] contour
廓清[kakusei] purification
廓詞[kuruwakotoba] sociolect or secret language used by prostitutes in red-light districts (Edo period)

塞爾維[serubia] Serbia
梗塞[kousoku] stoppage
塞栓[sokusen] embolus
充塞[juusoku] plug
人間万事塞翁が馬[jinkanbanjisaiougauma] inscrutable are the ways of heaven

腸閉塞[chouheisoku] intestinal obstruction
脳硬塞[noukousoku] stroke (blocked blood vessel in brain)
八方塞がり[happoufusagari] all doors closed
閉塞[heisoku] closure
要塞[yousai] fort

山砦[sansai] mountain stronghold
城砦[jousai] fortress
砦を落とす[toridewootosu] to capture a fort

砦を築く[toridewokizuku] to construct a fort
鹿砦[rokusai] abatis

鉄柵[tessaku] iron railing or fence
柵状組織[sakujousoshiki] palisade layer

立入禁止柵[tachiirikinshisaku] no-entry barrier
柵封[sakuhou] documents of feudal appointment (in China)

一塁[ichirui] first base
一塁手[ichiruishu] first baseman
一塁線[ichiruisen] first-base line
堅塁[kenrui] stronghold
三塁[sanrui] third base

三塁手[sanruishu] third baseman
三塁線[sanruisen] third-base line
三塁打[sanruida] three-base hit
出塁[shutsurui] on base (baseball)

橋頭堡[kyoutouho] bridgehead
五稜堡[goryouho] five-sided fort
堡礁[hoshou] barrier reef

堡塁[hourui] fort
海堡[kaihou] breakwater

柬蒲寨[kanbojia] Cambodia

山寨[sansai] mountain stronghold