chemist vs pill roller

chemist and pill roller both are nouns.

Word	Noun	Adjective	Verb	Adverb
chemist	Yes	No	No	No
pill roller	Yes	No	No	No

As nouns, chemist and pill roller are synonyms defined as:

chemist and pill roller: a health professional trained in the art of preparing and dispensing drugs

Other synonyms of chemist include apothecary, druggist, pharmacist, pill pusher.

chemist (noun)	pill roller (noun)
a scientist who specializes in chemistry	a health professional trained in the art of preparing and dispensing drugs
a health professional trained in the art of preparing and dispensing drugs