drugstore vs apothecary's shop

drugstore and apothecary's shop both are nouns.

Word	Noun	Adjective	Verb	Adverb
drugstore	Yes	No	No	No
apothecary's shop	Yes	No	No	No

As nouns, drugstore and apothecary's shop are synonyms defined as:

drugstore and apothecary's shop: a retail shop where medicine and other articles are sold

Other synonyms of drugstore include chemist's, chemist's shop, pharmacy.

drugstore (noun)	apothecary's shop (noun)
a retail shop where medicine and other articles are sold	a retail shop where medicine and other articles are sold