Proper nouns don't have synonyms.
What is the synonym government.
national
the American government. :)
national
tyranny
union government.
Brotherhood; Allegiance
The national government declares war.
When used correctly, the word "federal" (as in "federal system") refers to the division of political power between the national government and the state governments. However, people use the word "federal" as a synonym for the word "national." Therefore, when people use the phrase, "Today, the federal government decided...." they are (usually) referring to the national government and not the division of power between the national and state governments. This is an example of a technical term in political science being incorrectly used.
administration, authority, government, managment
The national government.
the government that takes care of things that need to be done state wise.