writer vs Elizabeth Haldane

writer and Elizabeth Haldane both are nouns.

Word	Noun	Adjective	Verb	Adverb
writer	Yes	No	No	No
Elizabeth Haldane	Yes	No	No	No

writer (noun)	Elizabeth Haldane (noun)
writes (books or stories or articles or the like) professionally (for pay)	Scottish writer and sister of Richard Haldane and John Haldane (1862-1937)
a person who is able to write and has written something