dimenhydrinate vs antiemetic

dimenhydrinate and antiemetic both are nouns.

Word	Noun	Adjective	Verb	Adverb
dimenhydrinate	Yes	No	No	No
antiemetic	Yes	No	No	No

As nouns, antiemetic is a hypernym of dimenhydrinate; that is, antiemetic is a word with a broader meaning than dimenhydrinate:

dimenhydrinate: antihistamine and antiemetic (trade name Dramamine) used to treat motion sickness
antiemetic: a drug that prevents or alleviates nausea and vomiting

Other hypernyms of dimenhydrinate include antiemetic drug, antihistamine.

dimenhydrinate (noun)	antiemetic (noun)
antihistamine and antiemetic (trade name Dramamine) used to treat motion sickness	a drug that prevents or alleviates nausea and vomiting