Sir Rabindranath Tagore vs writer

Sir Rabindranath Tagore and writer both are nouns.

Word	Noun	Adjective	Verb	Adverb
Sir Rabindranath Tagore	Yes	No	No	No
writer	Yes	No	No	No

Sir Rabindranath Tagore (noun)	writer (noun)
Indian writer and philosopher whose poetry (based on traditional Hindu themes) pioneered the use of colloquial Bengali (1861-1941)	writes (books or stories or articles or the like) professionally (for pay)
	a person who is able to write and has written something