minor tranquillizer vs minor tranquilizer

minor tranquillizer and minor tranquilizer both are nouns.

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

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

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

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

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