Just like with home addresses, Internet addresses have a name for the location of a website. Check available domain names at Register.com if they are applicable to the ones that are needed. The end of a URL is sort of like the name of the type of street in an address.
A physical business or home address will have the name of the street, the number of the house on the street, and the name for the type of street it is. There are similar street names all over the world. There are also similar county names and city names in several different states. Las Vegas is in Nevada, but most people do not know there is a Las Vegas in New Mexico. This is important information to know when going to buy a ticket for a vacation.
The type of city is similar to the URL address text. One site might have something to do with a professional sports team and have information about that team on the site. Another site might have the same team name, but it might be worded a bit differently in the address. It might not even be a sports team some of the times. It could also be a little league team for a kids team. This is why it is important to know what URL address is needed and to find out what URL names are already taken.
If a name is already taken, a company could try and word that differently if they would like. If the subject is too similar like the sports teams, it might be a bad thing though. If a sports team is trying to get the word out about the upcoming events and people type the URL in differently, they might end up a sporting event for kids instead of a world series type of game. It is different for every situation, but some companies even buy out the URL from the other address. This can be done if good communication skills are present within a company. They will often have to pay a high price to get the name though. If the user knows that the company has money, they might try and squeeze them for every last cent before giving it up.
In conclusion, getting a URL can be difficult or easy. If the business specializes in something that no one has ever heard of, they will have an easy time picking a URL. A cheap price is always in the best interest though when picking the right URL.