drafter vs author

drafter and author both are nouns.

Word	Noun	Adjective	Verb	Adverb
drafter	Yes	No	No	No
author	Yes	No	Yes	No

As nouns, author is a hypernym of drafter; that is, author is a word with a broader meaning than drafter:

drafter: a writer of a draft
author: writes (books or stories or articles or the like) professionally (for pay)

Other hypernyms of drafter include writer.

drafter (noun)	author (noun)
a writer of a draft	writes (books or stories or articles or the like) professionally (for pay)
	someone who originates or causes or initiates something

drafter (verb)	author (verb)
	be the author of