chemist vs William Hyde Wollaston

chemist and William Hyde Wollaston both are nouns.

Word	Noun	Adjective	Verb	Adverb
chemist	Yes	No	No	No
William Hyde Wollaston	Yes	No	No	No

chemist (noun)	William Hyde Wollaston (noun)
a scientist who specializes in chemistry	English chemist and physicist who discovered palladium and rhodium and demonstrated that static and current electricity are the same (1766-1828)
a health professional trained in the art of preparing and dispensing drugs