I would check a dictionary
Feudalism
http://dictionary.reference.com/search?q=feudalismI was always under the impression that the key to feudalism was the division of land between lords who answered to the king (who was usually chosen by "god"). It was a strict hierarchy with strong importance placed upon the ownership and loyalty to certain parts of land.
Federalism
http://dictionary.reference.com/search?q=federalismI have no idea where you were going with this. Federalism is the kind of hub and spoke approach to government that we (currently) use in the United States. There is a centralized hub, the federal government, that interacts and plays power games with the spokes, local government. We used to be a con-federal system where the federal government was supposed to have very limited power and the states much more power. This was so that power was concentrated closer to the individual so you weren't being ruled by someone who didn't share your thoughts and values. Remember they were emerging from and trying to fight against the system of monarchy so the individual's rights and preferences were given great importance, or at least, more importance.
In my experience when people talk about federalism they're talking about the balance of power between the states and the federal government. For instance, is marriage a state issue or a federal issue? Federalists (to grossly oversimplify democrats have traditionally been federalists) would tend toward it being a federal issue. States rights people (con-federalists) would tend to argue it's a more local or state issue.
Hope that helps and my goal here is not to be mean to Darkstar whom I welcome to DU but to try and catch a small mistake and fix it.