Not only do different people call different structures in the brain by different names, depending on which classificatory scheme they use and which species they mainly invesitgate, but also the different structures are all heirarchically organised so that any given structure is probably also part of several supa-structures and will contain a number of sub-structures.
Help is at hand.
This is a basic crib sheet for the basic terminology on prefixes, directional terminology, etc
BrainInfo is great for definitions of areas, showing where they are in the heirarchy, what else they are called and what else they contain.
And the Whole Brain Atlas is another great resource for orientating yourself.