According to research by the Global Language Monitor Twitter was the top word of 2009. The analysis was completed in November using a proprietary algorithm that tracks words and phrases in the media and on the internet (including blogs and social media). The words are tracked in relation to frequency, contextual usage and appearance in global media outlets, factoring in long-term trends, short-term changes, momentum and velocity.
Twitter was followed by Obama, H1N1, stimulus, and vampire. The near-ubiquitous suffix, 2.0, was sixth, with deficit, Hadron, healthcare, and transparency also in the top 10.