my fear is that supercalifragilisticexpialidocious starts to look like a short and simple word in no time.
I agree. But let's build it step after step. First, genders. I would be good that more people vote. Let's call it "noun class" as it is the good word for it.
Proposition A
noun class 1 : All intelligent things. Dwarves, goblins, elves, humans. Perhaps FB, Titans, and semi MB ? They are edible, intelligent, but they are "special" and sometimes are objects of cult.
noun class 2 : All living non intelligent things, and things important for Dwarves. Magma, other animals. Perhaps artifacts ? or Booze ?
noun class 3 : All non-living things. Wood (including trees), water, walls, ore, everything else, actually.
Proposition B :
noun class 1: Things for ultimate worship. (Gods, Books, artifacts, ...)
noun class 2 : Things to fear and respect, casual worship. (Magma, ...)
noun class 3 : Intelligent things for industry but not for worship. (Dwarfs, ...)
noun class 4: Non intelligent things, not for worship. (Trees, sheep, ...)
noun class 5: Non-living things, not for worship. (Stone, Rain, ...)
Proposition C :
noun class 1: animate hostile things (mainly, many creatures)
noun class 2 : animate friendly things (dwarves, elves most of the times, human, some creatures)
noun class 3 : inanimate hostile things (magma perhaps, undead or not, not a lot of things actually)
noun class 4: inanimate friendly things (soil, ore, walls, moutains rivers and trees, etc.)