Irving vs author

Irving and author both are nouns.

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

Irving (noun)	author (noun)
United States writer of darkly humorous novels (born in 1942)	writes (books or stories or articles or the like) professionally (for pay)
United States writer remembered for his stories (1783-1859)	someone who originates or causes or initiates something

Irving (verb)	author (verb)
	be the author of