Svengali, Houdini, the Great Soprendo - even magicians' names sound magical and mysterious. An episode from the recent radio series Fry's English Delight (listen here - you've got another year to do so) looked at the language of magic, and at magical language.
The Harvard linguist Steven Pinker talked about how, if we are in earshot of words, we cannot help processing what we hear. So, words are very powerful in that sense, and could be seen themselves as a kind of magic. Words associated with magic, for instance abracadabra and hocus-pocus, are often nonsense words, often contain repetition of the same sound, or reduplication, and are designed to sound other-worldly.
We heard a recording of the occultist Aleister Crowley speaking Enochian, and heard the writer Philip Pullman saying how he was transfixed at school by his teacher reciting Samuel Taylor Coleridge's The Rime of the Ancient Mariner. We were allowed to hear one or two expressions from the secret language of magicians, but the magician on the programme refused to explain what they actually meant - if he had done so, he would have been thrown out of the Magic Circle.