How do I redirect a domain to a different domain
I would like to register a custom domain for my blog (akosmopolite.com). Then, I would like to register a different domain (for example : xyz.com) and then have it mapped to my main domain (akosmopolite.com) as xyz.Akosmopolite.com or akosmopolite.com/xyz (however it's supposed to look). This will be easier for readers who want to see only the info I write on the XYZ page within my website.
Also, if I buy a domain will I be able to have multiple pages with blog style capabilities in my site? Or does this only depend on the theme I choose?
The blog I need help with is akosmopolite.wordpress.com.