Raging Swan gives us ten nifty words to work into role-playing. And that’s one post in a whole series!
A most excellent resource. The years I read TSR’s Dragonlance, Spelljammer and Forgotten Realms fiction did more to dump archaic words in my head than any other body of work, excepting maybe Lord of the Rings.
Held Action 
An uncouth and inveterate killcow caused quite a garboil when he became overly vituperate to an Amanuensis. The poor fellow on the receiving end was hard at work at a pancart, posting a notice about a mantic who purportedly could arrest those ailing from mubblefubbles, and found himself under assault because the first man did not find the notice congruous with his own beliefs.
What he said.