Andersen vs author

Andersen and author both are nouns.

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

Andersen (noun)	author (noun)
a Danish author remembered for his fairy stories (1805-1875)	writes (books or stories or articles or the like) professionally (for pay)
	someone who originates or causes or initiates something

Andersen (verb)	author (verb)
	be the author of