The term Obama Campaign Word is 'HOPE', which is a four-letter word. The Obama campaign used the word 'HOPE' as a slogan to inspire people to believe in a better future. The slogan was used to emphasize the idea that change was possible and that the Obama campaign was the vehicle for that change. The slogan was also used to emphasize the idea that the Obama campaign was about more than just one person, but rather about a collective effort to bring about positive change.