ataractic agent vs tranquilizer

ataractic agent and tranquilizer both are nouns.

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

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

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

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

ataractic agent (noun)	tranquilizer (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