Although less well known, the MPW or Master of Professional
Writing degree is a terminal master's degree just like the MFA in
Creative Writing or Screenwriting. The MPW's versatility lies in
it's interdisciplinary nature. While an MFA student might have less
latitude in selecting courses, the MPW will allow courses in
playwriting, poetry, screenwriting, editing, non-fiction, technical
writing, business writing, copy writing, etc. The MPW will still
allow you to select a concentration, however you will be encouraged
to diversify your remaining classes.
I hope this helps.