Calderon de la Barca vs playwright

Calderon de la Barca and playwright both are nouns.

Word	Noun	Adjective	Verb	Adverb
Calderon de la Barca	Yes	No	No	No
playwright	Yes	No	No	No

Calderon de la Barca (noun)	playwright (noun)
Spanish poet and dramatist considered one of the great Spanish writers (1600-1681)	someone who writes plays