What remedies are there for a work situation involving a supervisor that is verbally abusive?

WOW, I've been in this situation before and it's not easy. You don't want to get fired, you certainly don't want to quit and then have to explain it to a future employer either. I'd suggest that he quietly - not on company time - start getting his feelers out there for a new job. Many times these kinds of people have done some good in the company and they just totally abuse their power because they know the company won't take action against them - the problem is - everyone they work with will eventually quit. I'd just quietly find another job and then submit my resignation.