tetracycline vs antibacterial

tetracycline and antibacterial both are nouns.

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

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

tetracycline: an antibiotic (trade name Achromycin) derived from microorganisms of the genus Streptomyces and used broadly to treat infections
antibacterial: any drug that destroys bacteria or inhibits their growth

Other hypernyms of tetracycline include antibacterial drug, bactericide.

tetracycline (noun)	antibacterial (noun)
an antibiotic (trade name Achromycin) derived from microorganisms of the genus Streptomyces and used broadly to treat infections	any drug that destroys bacteria or inhibits their growth

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