chemist vs William Lipscomb

chemist and William Lipscomb both are nouns.

Word	Noun	Adjective	Verb	Adverb
chemist	Yes	No	No	No
William Lipscomb	Yes	No	No	No

chemist (noun)	William Lipscomb (noun)
a scientist who specializes in chemistry	United States chemist noted for his theories of molecular structure (born in 1919)
a health professional trained in the art of preparing and dispensing drugs