writer vs Francois Mauriac

writer and Francois Mauriac both are nouns.

Word	Noun	Adjective	Verb	Adverb
writer	Yes	No	No	No
Francois Mauriac	Yes	No	No	No

writer (noun)	Francois Mauriac (noun)
writes (books or stories or articles or the like) professionally (for pay)	French novelist who wrote about the conflict between desire and religious belief (1885-1970)
a person who is able to write and has written something