Additional domain names can be pointed to your website hosted on either a cPanel Linux or a Plesk Windows Hosting package.
Parked Domains under cPanel See details
Domain Aliases under Plesk See details
For each Domain Alias that you submit, you would need to point this aliased domain name to your primary domain name (for which you have bought Hosting).
On the existing Name Servers of the Domain Alias, create 2 Address Records (A Records) pointing to your primary domain name. The Address Records can be viewed by clicking the Name Server Details link within the Order Details view page of the Web Hosting Order. Notice the first 2 Address Records and request your current DNS Service Provider to replicate them for your alias domain name.