author vs Rousseau

author and Rousseau both are nouns.

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

author (noun)	Rousseau (noun)
writes (books or stories or articles or the like) professionally (for pay)	French philosopher and writer born in Switzerland; believed that the natural goodness of man was warped by society; ideas influenced the French Revolution (1712-1778)
someone who originates or causes or initiates something	French primitive painter (1844-1910)

author (verb)	Rousseau (verb)
be the author of