cycloserine vs antibiotic drug

cycloserine and antibiotic drug both are nouns.

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

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

cycloserine: an antibiotic that is especially active against the tubercle bacillus
antibiotic drug: a chemical substance derivable from a mold or bacterium that can kill microorganisms and cure bacterial infections

Other hypernyms of cycloserine include antibiotic.

cycloserine (noun)	antibiotic drug (noun)
an antibiotic that is especially active against the tubercle bacillus	a chemical substance derivable from a mold or bacterium that can kill microorganisms and cure bacterial infections