besieged, bulwark, defence, fenced, fortress, siege, strong (hold), tower

“Siege” From Boyd’s Bible Dictionary:

(sit) (Deut. 20:19). [WAR.]

“Tower” From Boyd’s Bible Dictionary:

(shot up). Watchtowers, or fortified posts, were frequent on frontiers and exposed places (Gen. 35:21; 2 Chron. 26:10); around vineyards (Isa. 21:5,8,11; Matt. 21:33), and for the use of shepherds (Mic. 4:8). “Tower of Shechem” (Judg. 9:47), evidently a citadel or stronghold. Tower of Babel [BABEL]. “Tower of Siloam,” possibly an observatory (Luke 13:4).

“Fortress” From Concise Bible Dictionary:

The terms “fortress,” “stronghold,” and “castle” mostly refer to a part of a city that was more strongly fortified than by the mere walls. Proverbs 18:19 speaks of the “bars of a castle.” There was such a place in Jerusalem when the city was taken by David, which was held by the Jebusites (2 Sam. 5:6-7). The Romans had a “castle” in Jerusalem, to which Paul was carried when he was seized by the Jews (Acts 21:34, 37). This may have been the same that was called ANTONIA, a fortress built by Herod the Great, adjoining the temple, as described by Josephus: Wars, v. 5. 8. The Psalmist often calls Jehovah his rock and fortress (Psa. 18:2; Psa. 31:3; Psa. 71:3; Psa. 91:2).
A fortress on the Red Sea.

“Tower” From Concise Bible Dictionary:

Often referred to in scripture as a place of security, and also as a place of defense, on which watchmen were stationed. There were such on the walls of Jerusalem (Psa. 48:12; Psa. 61:3; 2 Kings 9:17). The term is also used symbolically: “the name of Jehovah is a strong tower” (Prov. 18:10).

Strong’s Dictionary of Hebrew Words:

Transliteration:
matsowr
Phonic:
maw-tsore’
Meaning:
or matsuwr {maw-tsoor'}; from 6696; something hemming in, i.e. (objectively) a mound (of besiegers), (abstractly) a siege, (figuratively) distress; or (subjectively) a fastness
KJV Usage:
besieged, bulwark, defence, fenced, fortress, siege, strong (hold), tower