chemist vs Gay-Lussac

chemist and Gay-Lussac both are nouns.

Word	Noun	Adjective	Verb	Adverb
chemist	Yes	No	No	No
Gay-Lussac	Yes	No	No	No

chemist (noun)	Gay-Lussac (noun)
a scientist who specializes in chemistry	French chemist and physicist who first isolated boron and who formulated the law describing the behavior of gases under constant pressure (1778-1850)
a health professional trained in the art of preparing and dispensing drugs