I'm not sure if "wizard" and "sorcerer" are just the same in the Harry Potter universe. I can remember Harry saying in a movie: "Dumbledore is the greatest sorcerer of all time". And I have read somewhere that wizards and witches stand on the same level. Wizards are sometimes used to describe "boys and girls" or "mankind" while witches are only for girls. Correct me if I'm mistaken.
Is the word "sorcerer" is just another term to describe a wizard/witch? Or are they different from each other?