minor tranquillizer vs antianxiety drug

minor tranquillizer and antianxiety drug both are nouns.

Word	Noun	Adjective	Verb	Adverb
minor tranquillizer	Yes	No	No	No
antianxiety drug	Yes	No	No	No

As nouns, minor tranquillizer and antianxiety drug are synonyms defined as:

minor tranquillizer and antianxiety drug: a tranquilizer used to relieve anxiety and reduce tension and irritability

Other synonyms of minor tranquillizer include anxiolytic, anxiolytic drug, minor tranquilizer, minor tranquilliser.

minor tranquillizer (noun)	antianxiety drug (noun)
a tranquilizer used to relieve anxiety and reduce tension and irritability	a tranquilizer used to relieve anxiety and reduce tension and irritability