I grabbed these unsupported reserve words about 4 years back from this forum. Andrew put them out there. I can't find them now in the forum. Some are in the power language functions documentation yet some are not. So I guess some are now supported and some are not.
There are three documents in the zip. I think the first one and second one are the same except I reformatted a bit in the second one. I am not sure about the 3rd one. It may be a bit different than the first one. Some day I may review these documents to see if I can determine if they are all basically the same commands or if there is a difference between the 1st one and the 3rd one.