chemist vs Bob Woodward

chemist and Bob Woodward both are nouns.

Word	Noun	Adjective	Verb	Adverb
chemist	Yes	No	No	No
Bob Woodward	Yes	No	No	No

chemist (noun)	Bob Woodward (noun)
a scientist who specializes in chemistry	United States chemist honored for synthesizing complex organic compounds (1917-1979)
a health professional trained in the art of preparing and dispensing drugs