First, they simply don’t matter yet. I’m mostly focusing on what the entities are and the relationships between them. A name can certainly help, if one comes to mind, but I don’t need a name yet.
Second, in exactly the same way a name can help, it can also hinder. For my purposes, a good name gives an indication of the nature of the named entity. Right now, I want flexibility, so I’m likely to only nail the name down if I have a really solid grasp of the entity being described.
Third, and related to the second, by dealing with the attributes of the elements I make it much easier to fit the content in more places. What I have so far suggests a more or less ‘standard D&D setting’: medieval-style technology and culture, monster in the bottom of the mines, graveyard and catacombs and ruined castle. I could fit the current arrangement into many ‘standard D&D’ campaigns without too much trouble. Because I don’t have names yet, it could also be pretty easily placed in other not-so-standard fantasy settings: Flying Swordsmen would be an easy fit (I’d have to change the shape of the castle, the floodplain might be rice paddies instead, and the monster is more of a terrain feature than something to be hunted down. A weird west setting might be better than a wild west setting, but either one could work.
Applying names can force these decisions. I don’t need to decide yet, so… no names yet.