chemist vs Todd

chemist and Todd both are nouns.

Word	Noun	Adjective	Verb	Adverb
chemist	Yes	No	No	No
Todd	Yes	No	No	No

chemist (noun)	Todd (noun)
a scientist who specializes in chemistry	Scottish chemist noted for his research into the structure of nucleic acids (born in 1907)
a health professional trained in the art of preparing and dispensing drugs	fictional character in a play by George Pitt; a barber who murdered his customers