federation
Commonwealth – Term for a political community founded for the common good
Federation of Australia – Process by which six separate British self-governing colonies became the country of Australia
Foederati – Peoples and cities bound by a treaty, typically in relation to Rome (Antiquity)
Independent city#Federal capitals – Type of city or town
Międzymorze (Intermarium) – Proposed country during World War I
New federalism – Transfer of certain powers from the United States federal government back to the states