10's and 100's of thousands of non-competitor Web sites can have the same combinations of words. Very few people take advantage of the fact that they can have multiple unique domain names. Choosing and using just one additional energized domain name and selecting the right text and keywords should as a minimum double your present visitors. Smart businesses that have an existing Web site are finding that the least expensive way to increase visitors to a Web site is to use multiple domain names. The additional domain names must bring something meaningful, i.e., does a better job of conveying the purpose of a Web site, is easier to remember, invigorates, intensifies or builds up a site's message, creates some excitement, props up an image, stimulates interest, reinforces the purpose, etc.
Big business does.
Most big businesses attempt to obtain the domain names for every sub-business unit, product and trademark they own. Everyone clicking on any of these will be redirected to the main Web site. Example, law firms are using this approach. Law firms have learned that the conventional method of simply using the law firm name is not a conducive to bringing new visitors. Law firms are grabbing up and using work-related domain names along with the firm name.