Ghostwriter vs Ghostwrites - What's the difference?

As a noun ghostwriter

is a professional writer who is paid to write books, articles, stories, or reports which are officially credited to another person.

(ghostwrite).

(wikipedia ghostwriter)

* ghost writer

(en noun)

A professional writer who is paid to write books, articles, stories, or reports which are officially credited to another person.

(head)

(ghostwrite)

To write under the name of another (especially literary works).

Mariana would rather not ghostwrite for a living because she finds it a thankless task.

To author a literary work or speech in the place of another.

The president has someone to ghostwrite his addresses.