Akıncı: (Turkish) "raider", a later replacement for ghāzī al-'Awāsim: the Syrio-Anatolian frontier area between the Byzantine and various caliphal empires ribāt: fortified convent used by a militant religious order; most commonly used in North Africa thughūr: an advanced/frontier fortress uc: Turkish term for frontier; uc beği (frontier lord) was a title assumed by early Ottoman rulers; later replaced by serhadd (frontier)