I prefer Papist as people seem to think it an insult. Not to me, I rather like it.
An azymite is a wafer-eater. It was once said that "All pope worshipping wafer-eaters are heretics", but that did not include the Uniates as the Uniates were never azymites. Those were the days before politically correct speech came along. Nowadays, we try to avoid such speech so as not to cause offense. It has the disadvantage, however, of encouraging people to think all is well when, in fact, all may very well be worse than it ever was.