tranquillizer vs antianxiety agent

tranquillizer and antianxiety agent both are nouns.

Word	Noun	Adjective	Verb	Adverb
tranquillizer	Yes	No	No	No
antianxiety agent	Yes	No	No	No

As nouns, tranquillizer and antianxiety agent are synonyms defined as:

tranquillizer and antianxiety agent: a drug used to reduce stress or tension without reducing mental clarity

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

tranquillizer (noun)	antianxiety 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