No Amiga wordprocessors are up to date, but there are several of them mentioned here which do a very decent job for standard wordprocessing. I use Wordworth 7 every now and then, which I find very nice to use. None of the wordprocessors on the Amiga can stand up to MS Word 97 or later, though, and you can forget any decent support of loading files in MS Word-format.
On the other hand, I used a C64 with Vizawrite & Tasword back in the days. All Amiga wordprocessors mentioned here just trample the 64 versions I used. Everything is relative...