superagency

noun

1. An agency with unusually far-reaching powers

   “[…] a plan to create a Brussels superagency that could intervene in domestic markets lacks natural consumer appeal and faces formidable industry opposition.”

2. (California)A cabinet-level agency within the executive branch, composed of several departments.

   “The state health agency in California is called State Department of Health Services and is a component of a superagency, the California Health and Welfare Agency.”