united — made into or caused to act as a single entity: a united front.
confederated — Simple past tense and past participle of confederate.
in cahoots — go cahoots, to share equally; become partners: They went cahoots in the establishment of the store. Also, go in cahoot with, go in cahoots.
federal — pertaining to or of the nature of a union of states under a central government distinct from the individual governments of the separate states, as in federal government; federal system.
syndicated — a group of individuals or organizations combined or making a joint effort to undertake some specific duty or carry out specific transactions or negotiations: The local furniture store is individually owned, but is part of a buying syndicate.