With the amount of information and ideas on the Internet, it is difficult to come up with words (even fabricated ones) that haven't been used in some context before. Let's say that in the course of creating a corporation, the person filing the paperwork searches the Internet for their proposed business name (and trademark). There are likely some search hits: a college project from a few years back, a fictional weapon from some online novel, or a project name from an abandoned (and never trademarked) system from a small company.
Does the entity incorporating move on to even more obscure names, or are they safe using their chosen (and rare and untrademarked) name?