tranquilizer vs ataractic drug

tranquilizer and ataractic drug both are nouns.

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

As nouns, tranquilizer and ataractic drug are synonyms defined as:

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

Other synonyms of tranquilizer include antianxiety agent, ataractic, ataractic agent, tranquilliser, tranquillizer.

tranquilizer (noun)	ataractic drug (noun)
a drug used to reduce stress or tension without reducing mental clarity	a drug used to reduce stress or tension without reducing mental clarity