writer vs Wilhelm Grimm

writer and Wilhelm Grimm both are nouns.

Word	Noun	Adjective	Verb	Adverb
writer	Yes	No	No	No
Wilhelm Grimm	Yes	No	No	No

writer (noun)	Wilhelm Grimm (noun)
writes (books or stories or articles or the like) professionally (for pay)	the younger of the two Grimm brothers remembered best for their fairy stories (1786-1859)
a person who is able to write and has written something