Ok so I wanted to use the schools of magic from D&D however, I don't think that it is under fair use in Canada. Does anybody know for sure?
You could just make them different, change some of their names, or just not call them schools. Types? Kinds? Catogories? The names are super generic themselves: divination, necromancy, enchantment, invocation... They didn’t invent those words for d&d and they are more descriptive than anything. But I don’t know. I’d just change it up a little and make it my own.
I doubt they can copyright a single word, but they may have trademarks. That aside if you aren't writing fanfic why make your book derivative?