tranquilizer vs ataractic agent

tranquilizer and ataractic agent both are nouns.

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

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

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

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

tranquilizer (noun)	ataractic agent (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