Verses with the word conspired in the Apocrypha (2 verses):

Sirach 45:18
Strangers conspired together against him, and maligned him in the wilderness, even the men that were of Dathan's and Abiron's side, and the congregation of Core, with fury and wrath.

Bel and the Dragon 1:28
When they of Babylon heard that, they took great indignation, and conspired against the king, saying, The king is become a Jew, and he hath destroyed Bel, he hath slain the dragon, and put the priests to death.