Cannot adding this domain (www.vogpay.com) cause name can’t be used because it contains a protected word or inappropriate language

I am trying to register another domain under my account. Each time I get the error: This domain name can't be used because it contains a protected word or inappropriate language.

I do own the domain name called www.vogpay.com .

And why called www.vogpay.com, cause :

V = Voucher

O = Online

G = Games

PAY =PAYments

Can I inform someone to help me allow the name.

Thanks and Regards

JT