John Roderigo Dos Passos vs writer

John Roderigo Dos Passos and writer both are nouns.

Word	Noun	Adjective	Verb	Adverb
John Roderigo Dos Passos	Yes	No	No	No
writer	Yes	No	No	No

John Roderigo Dos Passos (noun)	writer (noun)
United States novelist remembered for his portrayal of life in the United States (1896-1970)	writes (books or stories or articles or the like) professionally (for pay)
	a person who is able to write and has written something