In The Hobbit, orcs are called goblins, ...
I just noticed this post. In Tolkien's mythology Orcs and Goblins are different types of creatures.
It's also shown that way in the Jackson's LotR films. You see Goblins in the Mines of Moria and they look and act differently than Orcs. Goblins also have a different social structure with kings etc. In fact Goblins in Tolkien mythology is actually somewhat close to Oblivion's goblins - often underground, with a hierarchy of leaders. Vs Orcs that seem to mostly serve the evil villains.