poet vs Pedro Calderon de la Barca

poet and Pedro Calderon de la Barca both are nouns.

Word	Noun	Adjective	Verb	Adverb
poet	Yes	No	No	No
Pedro Calderon de la Barca	Yes	No	No	No

poet (noun)	Pedro Calderon de la Barca (noun)
a writer of poems (the term is usually reserved for writers of good poetry)	Spanish poet and dramatist considered one of the great Spanish writers (1600-1681)