Mural towers, bastions, were introduced by king Uzziah (2 Chr. 26:15; Zeph. 1:16; Ps. 48:13; Isa. 26:1). There are five Hebrew words so rendered in the Authorized Version, but the same word is also variously rendered.
Easton’s Bible Dictionary
Bulwarks
Easton’s Bible Dictionary (1897), public domain. Text via Theographic Bible Metadata, CC BY-SA 4.0.