author vs Boswell

author and Boswell both are nouns.

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

author (noun)	Boswell (noun)
writes (books or stories or articles or the like) professionally (for pay)	Scottish author noted for his biography of Samuel Johnson (1740-1795)
someone who originates or causes or initiates something	a devoted admirer and recorder of another's words and deeds

author (verb)	Boswell (verb)
be the author of