antianxiety drug vs ataractic

antianxiety drug and ataractic both are nouns.

Word	Noun	Adjective	Verb	Adverb
antianxiety drug	Yes	No	No	No
ataractic	Yes	Yes	No	No

As nouns, ataractic is a hypernym of antianxiety drug; that is, ataractic is a word with a broader meaning than antianxiety drug:

antianxiety drug: a tranquilizer used to relieve anxiety and reduce tension and irritability
ataractic: a drug used to reduce stress or tension without reducing mental clarity

antianxiety drug (noun)	ataractic (noun)
a tranquilizer used to relieve anxiety and reduce tension and irritability	a drug used to reduce stress or tension without reducing mental clarity

antianxiety drug (adjective)	ataractic (adjective)
	tending to soothe or tranquilize