antiemetic drug vs antiemetic

antiemetic drug and antiemetic both are nouns.

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

As nouns, antiemetic drug and antiemetic are synonyms defined as:

antiemetic drug and antiemetic: a drug that prevents or alleviates nausea and vomiting

antiemetic drug (noun)	antiemetic (noun)
a drug that prevents or alleviates nausea and vomiting	a drug that prevents or alleviates nausea and vomiting