Azzah is the older form of Gaza, the well-known Philistine city.
Definition
Azzah is the more accurate older form of the name Gaza. It means “strong.” Gaza was the well-known Philistine city named in the supplied passages.
Biblical Usage
Azzah occurs in older biblical forms of passages that refer to Gaza and its surrounding region.
Historical Background
The Revised Version uses Gaza where the King James Version has Azzah.
Historical Bible Dictionaries
Smith's Bible Dictionary
(the strong). The more accurate rendering of the name of the well-known Philistine city Gaza. (2:23; 1 Kings 4:24; Jeremiah 25:20)
International Standard Bible Encyclopedia (ISBE)
<p>az'-a (`azzah, "strong"): the King James Version form (De 2:23; 1Ki 4:24; Jer 25:20) for the Revised Version (British and American) "Gaza."</p>