how do i create a specific link for my jot form

URL: product purchase order form. com

i would like my link to say www.centurylinkorderform.com 

You can create custom domains for your form links, but that feature is available only for JotForm Enterprise users - https://www.jotform.com/enterprise/ 

Related Guide: How-to-Use-Custom-Domains-with-JotForm-Enterprise