writer vs Gunter Wilhelm Grass

writer and Gunter Wilhelm Grass both are nouns.

Word	Noun	Adjective	Verb	Adverb
writer	Yes	No	No	No
Gunter Wilhelm Grass	Yes	No	No	No

writer (noun)	Gunter Wilhelm Grass (noun)
writes (books or stories or articles or the like) professionally (for pay)	German writer of novels and poetry and plays (born 1927)
a person who is able to write and has written something