sulfa vs antibacterial

sulfa and antibacterial both are nouns.

Word	Noun	Adjective	Verb	Adverb
sulfa	Yes	No	No	No
antibacterial	Yes	Yes	No	No

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

sulfa: antibacterial consisting of any of several synthetic organic compounds capable of inhibiting the growth of bacteria that require PABA
antibacterial: any drug that destroys bacteria or inhibits their growth

Other hypernyms of sulfa include antibacterial drug, bactericide.

sulfa (noun)	antibacterial (noun)
antibacterial consisting of any of several synthetic organic compounds capable of inhibiting the growth of bacteria that require PABA	any drug that destroys bacteria or inhibits their growth

sulfa (adjective)	antibacterial (adjective)
	destroying bacteria or inhibiting their growth