I've always been fascinated by word and that's why I'm fascinated by this post from the Global Language Monitor naming their top words for 2009.
Number one word, of course, is "twitter." Number two is "Obama" which can be stuck onto other words like Obama-care. Number three is "H1N1." Number 4 is "stimulus." Number 5 is "vampire."
Check the post for the rest. After a cursory look of the blog, I will come back and take a deeper look to see what more it has to say about words and language.