While there are a plethora of terms in the world, socket and outlet mean the same thing! Essentially they are two sides of the same coin. Some would say a socket is where you plug in another object. That's why there are power sockets and light sockets. Meanwhile, an outlet is something electricity comes out of. Hence the power outlet. But both meanings are used for the same powerpoint. Different languages may refer to both, or just one or the other. It can certainly be confusing when there are so many names thrown around.