In a federative way.

A surname.

plural of federator

Someone or something that is instrumental in the creation of a federation. / (computing) A component that integrates access to various services.

plural of Feder

Act of joining together into a single political entity. / Array of nations or states that are unified under one central authority which is elected by its members.

(Australia) Of an architectural style popular around the time of federation.

A surname from German, equivalent to English Feather.

plural of federation

In a federal manner.