Depending on the kind of hosting account you have, you can either host multiple, separate websites or you can use subdomains on your primary domain name. For more information, see What type of hosting account do I have?
Our Deluxe, Premium, Unlimited, and Ultimate hosting accounts can host multiple websites. For more information, see Manage hosting account domains
While we offer unlimited domain aliasing on our Deluxe, Premium, Unlimited, and Ultimate shared hosting accounts, we do not recommend using shared hosting for more than ten websites. Doing so taxes the server resources and hinders performance.