writer vs Henry Valentine Miller

writer and Henry Valentine Miller both are nouns.

Word	Noun	Adjective	Verb	Adverb
writer	Yes	No	No	No
Henry Valentine Miller	Yes	No	No	No

writer (noun)	Henry Valentine Miller (noun)
writes (books or stories or articles or the like) professionally (for pay)	United States novelist whose novels were originally banned as pornographic (1891-1980)
a person who is able to write and has written something