You can set up a domain name that you own to point to another domain name. This is known as "parking" a domain.
Example: You own the dummybusiness.com and dummyinnovation.com domain names. You already have a web site for dummybusiness.com, but you do not want to create a new web site for dummyinnovation.com at the moment. By parking dummyinnovation.com on top of dummybusiness.com, all URLs for dummyinnovation.com will automatically go to dummybusiness.com instead.

For instructions on how to park a domain on your account, please see this article.