sulfapyridine vs sulfa drug

sulfapyridine and sulfa drug both are nouns.

Word	Noun	Adjective	Verb	Adverb
sulfapyridine	Yes	No	No	No
sulfa drug	Yes	No	No	No

As nouns, sulfa drug is a hypernym of sulfapyridine; that is, sulfa drug is a word with a broader meaning than sulfapyridine:

sulfapyridine: sulfa drug derived from pyridine and sulfanilamide
sulfa drug: antibacterial consisting of any of several synthetic organic compounds capable of inhibiting the growth of bacteria that require PABA

Other hypernyms of sulfapyridine include sulfa, sulfonamide, sulpha.

sulfapyridine (noun)	sulfa drug (noun)
sulfa drug derived from pyridine and sulfanilamide	antibacterial consisting of any of several synthetic organic compounds capable of inhibiting the growth of bacteria that require PABA