author vs Sandburg

author and Sandburg both are nouns.

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

author (noun)	Sandburg (noun)
writes (books or stories or articles or the like) professionally (for pay)	United States writer remembered for his poetry in free verse and his six volume biography of Abraham Lincoln (1878-1967)
someone who originates or causes or initiates something

author (verb)	Sandburg (verb)
be the author of