Tarbell vs author

Tarbell and author both are nouns.

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

Tarbell (noun)	author (noun)
United States writer remembered for her muckraking investigations into industries in the early 20th century (1857-1944)	writes (books or stories or articles or the like) professionally (for pay)
	someone who originates or causes or initiates something

Tarbell (verb)	author (verb)
	be the author of