chemist vs Richard Errett Smalley

chemist and Richard Errett Smalley both are nouns.

Word	Noun	Adjective	Verb	Adverb
chemist	Yes	No	No	No
Richard Errett Smalley	Yes	No	No	No

chemist (noun)	Richard Errett Smalley (noun)
a scientist who specializes in chemistry	American chemist who with Robert Curl and Harold Kroto discovered fullerenes and opened a new branch of chemistry (born in 1943)
a health professional trained in the art of preparing and dispensing drugs