When we were originally shopping for a domain name, we were sad to find out that eighthday.com and 8thday.com were taken. We settled with eighthDaySlc.com. Which is hard to remember. Many people had a hard time typing it because they spelled eighth wrong. Luckily with the .rocks domain extension, we purchased a new extension!
We didn't even have to do any special configurations for our current website. We kept the old URL, and we simply redirected traffic from the new URL to eighthDaySlc.com. In fact, many businesses and organizations buy many domain names to point to a single URL.