|Easton's Bible Dictionary|
Rainy, the eighth ecclesiastical month of the year (1 Kings 6:38), and the second month of the civil year; later called Marchesvan (q.v.). (see MONTH.)
Int. Standard Bible Encyclopedia
bul (bul): Name of the 8th month of the Jewish year (1 Kings 6:38). It is of Phoenician origin and signifies the month of rain, the beginning of the rainy season.
Bul (1 Occurrence)
1 Kings 6:38 In the eleventh year, in the month Bul, which is the eighth month, was the house finished throughout all its parts, and according to all its fashion. So was he seven years in building it. (WEB KJV JPS ASV BBE DBY WBS YLT NAS RSV NIV)