As per Laura's example, I've picked a word:
"Recineration - second time a thing or place is burned down"
As in, "After the recineration of her home, Jenna contemplated quitting sorcery school."
Oxford is right. Even spellcheck seems to think recineration isn't a word.
Now, since this is a writing blog, I'll offer a quick caution from the mouths (pages?) of Strunk and White:
"Avoid Fancy Words: Avoid the elaborate, the pretentious, the coy, and the cute. Do not be tempted by a twenty-dollar word when there is a ten-center handy, ready, and able."
So, in closing, maybe you can use clever words like "Mingent" (discharging urine), "Quaeritate" (to ask), and "Panchymagogue" (medicine purging body fluids from the body) in your conversation, but keep them off the pages of your novel.
So, what words have you found?