vancomycin vs antibiotic drug

vancomycin and antibiotic drug both are nouns.

Word	Noun	Adjective	Verb	Adverb
vancomycin	Yes	No	No	No
antibiotic drug	Yes	No	No	No

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

vancomycin: an antibiotic (trade name Vancocin) effective against some bacterial infections
antibiotic drug: a chemical substance derivable from a mold or bacterium that can kill microorganisms and cure bacterial infections

Other hypernyms of vancomycin include antibiotic.

vancomycin (noun)	antibiotic drug (noun)
an antibiotic (trade name Vancocin) effective against some bacterial infections	a chemical substance derivable from a mold or bacterium that can kill microorganisms and cure bacterial infections