From what you said it seems like you think that if it uses a word that we know and understand it should follow what we know and, well, understand. From that the dragons should be called wyverns, as the "dragons" in this game have two limbs, not four. All mythical elements should follow classic RPG and fantasy roots, not Bethesda's unique take on them. As said, ebony should be from wood, glass shouldn't be a green material that can be formed into sharp, strong blades. These plant and animal parts shouldn't be magical.
While I understand what you are saying, I have to disagree. I'm fine with the series using words and items we are familiar with and using them for the unfamiliar.
Well, I think you're getting part of my gist but what I'm trying to stress as a footnote here is that it isn't about what is real or not, but what consistently follows and what doesn't.
Iron and corundum live up to their namesakes for the majority of the the game, iron is actually 100% authentic, so my question is why does it shift into made up at such an odd point in their function?
Ebony doesn't live up to anything at all, not even it's composition. So it's fine.
A hypothetical problem in the same line of reasoning would be fire melting one ice wall but not another identical ice wall. It makes sense to a point and then deviates in the middle with no rhyme or reason.