federacies

/ˈfɛdərəsiz/
noun
  1. Political systems or unions in which separate states or regions share power with a central government while retaining some self-rule.
    • The textbook explained how federacies differ from unitary states.
    • Several small island nations have formed federacies to cooperate on trade and defense.
    • Political scientists study federacies to understand how power is divided between local and national governments.