I've been wondering for a while now whether the words "exorcism" and "sorcery" are related etymologically in any way. The question came to me from the fact that, in Greek, we have the word εξορκισμός for "exorcism", εξορκίζω for "exorcise", etc. And what made me curious is that we also use another derivative of the word "exorcism" (written out as ξόρκι/ksorki) to mean "sorcery" (or "spell"). I thought that maybe this could be more than coincidence.
But after looking around, I'm under the impression that they aren't related to each other. "Exorcism" seems related to όρκος/orkos (Greek for "oath", with "exorcism" meaning "to bind by oath"), while "sorcery" seems to share a (Latin) root with "sort".
Is there any deeper (maybe older) relationship between the two words that I'm not seeing? Or are they really just two unrelated words that happen to share a few letters?