I’m assuming that everyone who reads this knows what a “portmanteau” is (if not, it’s a word created by jamming two other words together, as in “spork” or “turducken” or “Oxbridge“). I didn’t know that Lewis Carroll is credited as the first writer to use it this way until this morning.
While you can expect more of these here, for today I’ll just point out that “Thanksgiving” is itself a portmanteau. I guess “Christmas” is too, now that I think about it.