build prerequisites (under BuildRequires tag) had to be enlarged in wordnet.spec.tmpl: rather than xorg-x11-libX11-devel we now appear need xorg-x11-devel, which entails a lot more libraries and include files. The motive for this was an error message
during compilation of wordnet: the libraries libXss* and libXext* were claimed to be unfindable even though they were present in the build system’s /usr/lib directory
it seems that there is no longer any alternative wordnet rpm package out there now