chemist vs Sir James Dewar

chemist and Sir James Dewar both are nouns.

Word	Noun	Adjective	Verb	Adverb
chemist	Yes	No	No	No
Sir James Dewar	Yes	No	No	No

chemist (noun)	Sir James Dewar (noun)
a scientist who specializes in chemistry	Scottish chemist and physicist noted for his work in cryogenics and his invention of the Dewar flask (1842-1923)
a health professional trained in the art of preparing and dispensing drugs