mural towers, bastions, were introduced by king Uzziah (2Ch 26:15; Zep 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.
And he made in Jerusalem machines invented by skilful men, to be upon the towers and upon the bulwarks, wherewith to shoot arrows and great stones. And his name spread far abroad; for he was marvellously helped, till he became strong.
Mark ye well her bulwarks, consider her palaces: that ye may tell it to the generation following.
In that day shall this song be sung in the land of Judah: We have a strong city; salvation doth he appoint for walls and bulwarks.
a day of the trumpet and alarm, against the fenced cities and against the high battlements.