chemist vs Walther Nernst

chemist and Walther Nernst both are nouns.

Word	Noun	Adjective	Verb	Adverb
chemist	Yes	No	No	No
Walther Nernst	Yes	No	No	No

chemist (noun)	Walther Nernst (noun)
a scientist who specializes in chemistry	German physicist and chemist who formulated the third law of thermodynamics (1864-1941)
a health professional trained in the art of preparing and dispensing drugs