Sir Robert Robinson vs chemist

Sir Robert Robinson and chemist both are nouns.

Word	Noun	Adjective	Verb	Adverb
Sir Robert Robinson	Yes	No	No	No
chemist	Yes	No	No	No

Sir Robert Robinson (noun)	chemist (noun)
English chemist noted for his studies of molecular structures in plants (1886-1975)	a scientist who specializes in chemistry
	a health professional trained in the art of preparing and dispensing drugs