chemist vs Hermann Emil Fischer

chemist and Hermann Emil Fischer both are nouns.

Word	Noun	Adjective	Verb	Adverb
chemist	Yes	No	No	No
Hermann Emil Fischer	Yes	No	No	No

chemist (noun)	Hermann Emil Fischer (noun)
a scientist who specializes in chemistry	German chemist noted for work on synthetic sugars and the purines (1852-1919)
a health professional trained in the art of preparing and dispensing drugs