茨城県[ibarakiken] Ibaraki prefecture (Kantou area)
王城[oujou] royal castle
下城[gejou] withdrawing from the castle
牙城[gajou] stronghold (esp. of an enemy or opponent)
開城[kaijou] capitulation (of fort)

宮城[kyuujou] Imperial Palace
宮城県[miyagiken] Miyagi prefecture (Tohoku area)
傾城[keisei] beauty
堅城[kenjou] strong fortress
古城[kojou] old castle

匈牙利[hangarii] Hungary
勃牙利[burugaria] Bulgaria
葡萄牙[porutogaru] Portugal
牙城[gajou] stronghold (esp. of an enemy or opponent)
歯牙[shiga] teeth (and tusks)

歯牙矯正術[shigakyouseijutsu] orthodontia
歯牙疾患[shigashikkan] dental disease
歯牙状[shigajou] dentation
象牙[zouge] ivory