'Conspired' in the Bible

Baasha the son of Ahijah of the house (tribe) of Issachar conspired against Nadab, and Baasha struck him down at Gibbethon, which belonged to the Philistines, while Nadab and all Israel were laying siege to Gibbethon.

His servant Zimri, commander of half his chariots, conspired against Elah. Now Elah was in Tirzah, getting drunk in the house of Arza, who was in charge of the [king’s] household in Tirzah.

and the people who were camped heard it said, “Zimri has conspired and has also struck down the king.” So all Israel made Omri, the commander of the army, king over Israel that day in the camp.