This domain name can’t be used because it contains a protected word or inappropriate language.

I'm trying to register my domain algorithmiclotteries.com on outlook.com and get the following error:

"This domain name can't be used because it contains a protected word or inappropriate language. Please contact support if you feel this is not the case."

The nature / purpose of this domain is to blog about academic works on mathematical algorithms behind know luck games (still under construction).

Thank you for your help.

Best regards,

Joseph