the act of confederating.

the state of being confederated.

a league or alliance.

a group of confederates, esp. of states more or less permanently united for common purposes.

the Confederation, the union of the 13 original U.S. states under the Articles of Confederation 1781?89.

( initial capital letter ) the federation of Ontario, Quebec, New Brunswick, and Nova Scotia, formed in 1867 and constituting the Dominion of Canada.

noun

anschluss , bloc , cartel , coalition , confederacy , federation , league , organization , union , association , club , congress , fellowship , fraternity , guild , order , society , sorority