Fantasy dictionary and style guide
I've come to the conclusion that what the field needs is a dictionary, or at least a spelling guide, for common fantasy terms. Words like scry and geas and sword fighting and spellcaster and so on. Some of them appear only in unabridged dictionaries (I just subscribed to Webster's Third New International Dictionary, Unabridged, and discovered by accident that if you say you want the free 14-day trial, they offer you two free months if you switch to a year's subscription, so it comes to 14 months for $30); others appear only in foreign-language dictionaries; others are compound words that don't show up in the dictionaries at all (which I usually assume means they're open compounds, to be spelled with a space in the middle, but I'm always a little hesitant about that).
I imagine the publishing companies that produce lots of high fantasy and/or lots of D&D tie-ins probably have style guides that list preferred spellings (and sometimes usage) for all such words; I wonder if such a company could be imposed upon to post such a guide online for public use.