Bertolt Brecht vs playwright

Bertolt Brecht and playwright both are nouns.

Word	Noun	Adjective	Verb	Adverb
Bertolt Brecht	Yes	No	No	No
playwright	Yes	No	No	No

Bertolt Brecht (noun)	playwright (noun)
German dramatist and poet who developed a style of epic theater (1898-1956)	someone who writes plays