You may think I'm just a Slubberdegullion, or Rodomontade, or worse, Omphaloskepsis. But after reading this post, you may go through Metanoia, and realize I have that certain Chatoyant, and that I'm merely trying to prevent the Chthonic of some very useful words. I know I'm being Panglossian to think that one obscure post is going to do anything, but I have to try. After all, I can't just sit around and be a Scrimshanker.
For more multi-syllabic obscure words, you can read this article from the BBC News Magazine.