That's very much a "that depends" sort of question. Is it a word that has meanings other than the trademarked sense, and do you have a site in mind that is based on such meanings? Do you plan on setting up a fan site, criticism site, or parody site that might have a free-speech defense if challenged by the trademark owner? Or are you just trying to exploit the similarity of the name to a famous trademark in order to get typein or search engine traffic? The answers to those questions will have a big effect on the likely outcome.