federal - noun

a member of the Union Army during the American Civil War

any federal law-enforcement officer

federal - adjective

• of or relating to the central government of a federation
• characterized by or constituting a form of government in which power is divided between one central and several regional authorities
• national; especially in reference to the government of the United States as distinct from that of its member units
• being of or having to do with the northern United States and those loyal to the Union during the American Civil War

federal - thesaurus

fed   union