Domain Name And Website Are The Same. From your domain dashboard select the domain name you want. A domain name is your websites equivalent of a street address.
However they work together to make websites possible. Domain names and web hosting are two different services. You still get your mail but you cant sleep there.
Basically a domain name system is like a massive address book that is constantly updated.
At first glance it seems like having a domain name that matches your business name is ideal. The Site name can be changed at any time as well so no hassle there. URL and domain name both seems to be similar entities but have some differences. Domain name is the short version while URL provides more detail.