Hello, thank you for reaching out to Microsoft Q&A.
According to the Microsoft account article here, if you remove an alias that's an email address from a Microsoft domain (like @hotmail.com, @live.com, @outlook.com, or @msn.com), you're permanently deleting the alias, and it can't be associated with any Microsoft account again.
So, if you have removed a @hotmail.com address, that address has been permanently deleted. Because Microsoft no longer recycles email addresses, you also won’t be able to create a new account using that same email address.
Reference:
Remove an email alias in your Microsoft Account