In addition to getting rid of the Star Warsian word Republic from the name (currently the Enduring Republic of Stars) and having my own unique name for it (the Enduring Worlds - still a democratic republic, btw), it also eliminates confusion arising from the fact that the current name (usually shortened to just Republic) is different from the adjective I use to describe things "of" the Republic (e.g., Enduring fleets instead of Republic fleets, Enduring systems instead of Republic systems, etc.). I defaulted to Enduring to minimize references to the word Republic in the story to minimize comparisons to Star Wars.
My whole purpose in renaming the Realm of Stars to a republic in the first place was to eliminate confusion caused by the fact that a realm is generally a kingdom, whereas the Realm is actually a republic that might one day be led by King Joseph, albeit serving as a president. I was fielding questions like: So is Joseph crown prince of the Realm? Oops.
If I change the Enduring Republic to the Enduring Worlds, then the adjective can remain Enduring, without causing any confusion (e.g., the Enduring fleet and the Enduring troops are part of the Enduring Worlds - much simpler terminology). Is also eliminates the word Republic altogether.
I'm not concerned about sentences like "The Enduring troops endured..." since I have no trouble avoiding the verb to endure in cases like that. I already have that problem anyway if I leave the name of the republic as the Enduring Republic. You'd still have to avoid sentences like "The Enduring troops endured..."
The only issue with the Enduring Worlds is that the "Star" of Bethlehem is part of the Enduring "Worlds", rather than the reverse, which is a little goofy. Ditto for things like "the star systems of the Enduring Worlds". I'll just have to be careful how I word sentences that involve both, at least until I've established in the reader's mind that the name of my interstellar republic is the Enduring Worlds, which is made up of star systems and planets.
I considered calling it the Enduring Systems, but that seemed too bland for a name.
Is that clearer?