Achromycin vs Minocin

Achromycin and Minocin both are nouns.

Word	Noun	Adjective	Verb	Adverb
Achromycin	Yes	No	No	No
Minocin	Yes	No	No	No

As nouns, Minocin is a hyponym of Achromycin; that is, Minocin is a word with a more specific, narrower meaning than Achromycin:

Achromycin: an antibiotic (trade name Achromycin) derived from microorganisms of the genus Streptomyces and used broadly to treat infections
Minocin: tetracycline antibiotic (trade name Minocin) used to treat a variety of bacterial and rickettsial infections

Other hyponyms of Achromycin include Declomycin, demeclocycline hydrochloride, minocycline.

Achromycin (noun)	Minocin (noun)
an antibiotic (trade name Achromycin) derived from microorganisms of the genus Streptomyces and used broadly to treat infections	tetracycline antibiotic (trade name Minocin) used to treat a variety of bacterial and rickettsial infections