chemist vs Harold W. Kroto

chemist and Harold W. Kroto both are nouns.

Word	Noun	Adjective	Verb	Adverb
chemist	Yes	No	No	No
Harold W. Kroto	Yes	No	No	No

chemist (noun)	Harold W. Kroto (noun)
a scientist who specializes in chemistry	British chemist who with Robert Curl and Richard Smalley discovered fullerenes and opened a new branch of chemistry (born in 1939)
a health professional trained in the art of preparing and dispensing drugs