Caldwell vs author

Caldwell and author both are nouns.

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

Caldwell (noun)	author (noun)
United States author remembered for novels about poverty and degeneration (1903-1987)	writes (books or stories or articles or the like) professionally (for pay)
	someone who originates or causes or initiates something

Caldwell (verb)	author (verb)
	be the author of