Tadeusz Reichstein vs chemist

Tadeusz Reichstein and chemist both are nouns.

Word	Noun	Adjective	Verb	Adverb
Tadeusz Reichstein	Yes	No	No	No
chemist	Yes	No	No	No

Tadeusz Reichstein (noun)	chemist (noun)
a Swiss chemist born in Poland; studied the hormones of the adrenal cortex	a scientist who specializes in chemistry
	a health professional trained in the art of preparing and dispensing drugs