poet vs Marianne Moore

poet and Marianne Moore both are nouns.

Word	Noun	Adjective	Verb	Adverb
poet	Yes	No	No	No
Marianne Moore	Yes	No	No	No

poet (noun)	Marianne Moore (noun)
a writer of poems (the term is usually reserved for writers of good poetry)	United States poet noted for irony and wit (1887-1972)