author vs Fitzgerald

author and Fitzgerald both are nouns.

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

author (noun)	Fitzgerald (noun)
writes (books or stories or articles or the like) professionally (for pay)	United States scat singer (1917-1996)
someone who originates or causes or initiates something	United States author whose novels characterized the Jazz Age in the United States (1896-1940)
	English poet remembered primarily for his free translation of the poetry of Omar Khayyam (1809-1883)

author (verb)	Fitzgerald (verb)
be the author of