author vs Mann

author and Mann both are nouns.

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

author (noun)	Mann (noun)
writes (books or stories or articles or the like) professionally (for pay)	German writer concerned about the role of the artist in bourgeois society (1875-1955)
someone who originates or causes or initiates something	United States educator who introduced reforms that significantly altered the system of public education (1796-1859)

author (verb)	Mann (verb)
be the author of