poet vs John Donne

poet and John Donne both are nouns.

Word	Noun	Adjective	Verb	Adverb
poet	Yes	No	No	No
John Donne	Yes	No	No	No

poet (noun)	John Donne (noun)
a writer of poems (the term is usually reserved for writers of good poetry)	English clergyman and metaphysical poet celebrated as a preacher (1572-1631)