writer vs Erle Stanley Gardner

writer and Erle Stanley Gardner both are nouns.

Word	Noun	Adjective	Verb	Adverb
writer	Yes	No	No	No
Erle Stanley Gardner	Yes	No	No	No

writer (noun)	Erle Stanley Gardner (noun)
writes (books or stories or articles or the like) professionally (for pay)	writer of detective novels featuring Perry Mason (1889-1970)
a person who is able to write and has written something