in federation with Synonym

together with - in association with - in partnership with - in collaboration with - allied with - alongside

“In federation with” describes a formal relationship in which one state or political entity is united with another within a federal structure while retaining a degree of internal self‑government. The phrase is typically used in constitutional or diplomatic contexts to indicate that two or more regions, territories, or countries share a common federal system, central institutions, and overarching legal framework. At the same time, each member of the federation keeps certain autonomous powers as defined by a constitution or treaty. It emphasizes both political unity and distributed authority, distinguishing a federation from a loose alliance or a fully centralized unitary state.