author vs Holmes

author and Holmes both are nouns.

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

author (noun)	Holmes (noun)
writes (books or stories or articles or the like) professionally (for pay)	a fictitious detective in stories by A. Conan Doyle
someone who originates or causes or initiates something	English geologist and supporter of the theory of continental drift (1890-1965)
	United States writer of humorous essays (1809-1894)
	United States jurist noted for his liberal opinions (1841-1935)

author (verb)	Holmes (verb)
be the author of