'Reigns' in the Bible

Then Nathan spoke to Bathsheba the mother of Solomon, “Have you not heard that Adonijah the son of Haggith has become king, and David our lord does not know about it?

Now, behold, Adonijah reigns; and you, my lord the king, don't know it.

There was war between Rehoboam and Jeroboam throughout their reigns.

There was war between Asa and Baasha king of Israel throughout their reigns.

There was war between Asa and Baasha king of Israel throughout their reigns.