There is a cool plugin called wp subdomains that lets you treat each page as a subdomain. There is a good discussion about setting this up here.
One important trick, best explained in the comments and not in the installation instructions, is setting up the subdomain in cpanel.
When you create the subdomain the installation instructions refer to “point the document root to the same path as your main wordpress document root.”
Normally, when you create a subdomain, such as in Hostgator, cpanel automatically creates a new subdirectory for the subdomain. For example, a subdomain called test is created in a subdirectory called test.
What you want to do instead, say for an add-on domain called google.com, is to erase the subdirectory reference to ‘test’ and instead use google.com (or google) or whatever the main directory is for the domain on which you have WordPress.
Tip: if after setting things up nothing appears on your subdomain, delete your subdomain in cpanel then make sure you follow this order: First, create your WordPress page and add the WP subdomain code as an extra field. Second, create the subdomain in cpanel.
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