Mycostatin vs antimycotic agent

Mycostatin and antimycotic agent both are nouns.

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

As nouns, antimycotic agent is a hypernym of Mycostatin; that is, antimycotic 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
antimycotic agent: any agent that destroys or prevents the growth of fungi

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

Mycostatin (noun)	antimycotic 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