Here are some U gems I've dug up.
ubication - The quality or state of being in a place; local relation; position or location; whereness
Uh huh… This must be what happens when you're on vacation and make an illegal u-turn.
ullage - the amount that a container (as a wine bottle or tank) lacks of being full
Sure, I can use that. Waiter, my wine glass has ullage in it.
ultima - The last syllable of a word
And here I thought it was a car.
I hope to see you tomorrow for some V fun!