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)

序に[tsuideni] incidentally
安寧秩序[anneichitsujo] peace and order
機序[kijo] mechanism
時間順序積[jikanjunjoseki] time ordered product (physics)
次序[jijo] order

順序[junjo] order
順序通り[junjodoori] in (the proper) order
順序不同[junjofudou] unordered
順序立てる[junjodateru] to put into order
序で[tsuide] opportunity