chemist vs Daniel Rutherford

chemist and Daniel Rutherford both are nouns.

Word	Noun	Adjective	Verb	Adverb
chemist	Yes	No	No	No
Daniel Rutherford	Yes	No	No	No

chemist (noun)	Daniel Rutherford (noun)
a scientist who specializes in chemistry	British chemist who isolated nitrogen (1749-1819)
a health professional trained in the art of preparing and dispensing drugs