antibiotic drug vs antibiotic

antibiotic drug and antibiotic both are nouns.

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

As nouns, antibiotic drug and antibiotic are synonyms defined as:

antibiotic drug and antibiotic: a chemical substance derivable from a mold or bacterium that can kill microorganisms and cure bacterial infections

antibiotic drug (noun)	antibiotic (noun)
a chemical substance derivable from a mold or bacterium that can kill microorganisms and cure bacterial infections	a chemical substance derivable from a mold or bacterium that can kill microorganisms and cure bacterial infections

antibiotic drug (adjective)	antibiotic (adjective)
	of or relating to antibiotic drugs