Mycostatin vs antifungal agent

Mycostatin and antifungal agent both are nouns.

Word	Noun	Adjective	Verb	Adverb
Mycostatin	Yes	No	No	No
antifungal agent	Yes	No	No	No

As nouns, antifungal agent is a hypernym of Mycostatin; that is, antifungal agent is a word with a broader meaning than Mycostatin:

Mycostatin: an antifungal and antibiotic (trade names Mycostatin and Nystan) discovered in New York State; derived from soil fungi actinomycetes
antifungal agent: any agent that destroys or prevents the growth of fungi

Other hypernyms of Mycostatin include antibiotic, antibiotic drug, antifungal, antimycotic, antimycotic agent, fungicide.

Mycostatin (noun)	antifungal agent (noun)
an antifungal and antibiotic (trade names Mycostatin and Nystan) discovered in New York State; derived from soil fungi actinomycetes	any agent that destroys or prevents the growth of fungi