antipsychotic vs ataractic drug

antipsychotic and ataractic drug both are nouns.

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

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

antipsychotic: tranquilizer used to treat psychotic conditions when a calming effect is desired
ataractic drug: a drug used to reduce stress or tension without reducing mental clarity

Other hypernyms of antipsychotic include antianxiety agent, ataractic, ataractic agent, tranquilizer, tranquilliser, tranquillizer.

antipsychotic (noun)	ataractic drug (noun)
tranquilizer used to treat psychotic conditions when a calming effect is desired	a drug used to reduce stress or tension without reducing mental clarity