writer vs Katherine Anne Porter

writer and Katherine Anne Porter both are nouns.

Word	Noun	Adjective	Verb	Adverb
writer	Yes	No	No	No
Katherine Anne Porter	Yes	No	No	No

writer (noun)	Katherine Anne Porter (noun)
writes (books or stories or articles or the like) professionally (for pay)	United States writer of novels and short stories (1890-1980)
a person who is able to write and has written something