Global Language Monitor is a Texas based company that measures the most commonly used words in the English language every year.  It turns out that the number one most used word of 2009 was “Twitter.” Following Twitter was the words “Barack Obama” and “H1N1″ at second and third place, respectively.  Other words that were included in the top 10 list was stimulus, vampire, 2.0, deficit, Hadron, healthcare, and transparency.  The full press release of the list is available after the jump.