The colors used for naming Dragons and Nymphs.
For example the fire dragons use: Crimson and Ruby
Maybe bring up other color names for an element that could have it applied.
Also, I have some criticism on how wordy Aether is. Maybe you should stick to mainly key-words such as the other elements. My OCD is going nuts on how messy it looks compared to the other elements. Perhaps you could trim it down?
EDIT: I suggest cutting the tables in half to separate all the words that already exist in game from ones that are generated by this topic.