minor tranquilizer vs minor tranquillizer

minor tranquilizer and minor tranquillizer both are nouns.

Word	Noun	Adjective	Verb	Adverb
minor tranquilizer	Yes	No	No	No
minor tranquillizer	Yes	No	No	No

As nouns, minor tranquilizer and minor tranquillizer are synonyms defined as:

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

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

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