tranquilliser vs antianxiety agent

tranquilliser and antianxiety agent both are nouns.

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

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

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

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

tranquilliser (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