chemist vs Eduard Buchner

chemist and Eduard Buchner both are nouns.

Word	Noun	Adjective	Verb	Adverb
chemist	Yes	No	No	No
Eduard Buchner	Yes	No	No	No

chemist (noun)	Eduard Buchner (noun)
a scientist who specializes in chemistry	German organic chemist who studied alcoholic fermentation and discovered zymase (1860-1917)
a health professional trained in the art of preparing and dispensing drugs