What is a word in the hobbit that starts with J, U, X, and Z?

Really, this is very simple if you have a book. If you don't, let me know.

I don't have a book. That's the only reason I asked for help on here.

Okay, There are of course so many.

Jump, jerk

Use

X and Z are tricky I've read for a while but if I see any, I shall e back.