sulfa drug vs sulpha

sulfa drug and sulpha both are nouns.

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

As nouns, sulfa drug and sulpha are synonyms defined as:

sulfa drug and sulpha: antibacterial consisting of any of several synthetic organic compounds capable of inhibiting the growth of bacteria that require PABA

Other synonyms of sulfa drug include sulfa, sulfonamide.

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