SEPTEMBER EQUINOX(noun)Did you mean?Synonyms RhymesDefinitions There is 1 meaning of the phrase September Equinox. September Equinox - as a noun September 22 Synonyms (Exact Relations)autumnal equinoxfall equinoxWord Variations & RelationsStarts SStarts SEStarts SEPStarts SEPTEnds XEnds OXEnds NOXEnds INOXStarts S & ends XStarts SE & ends XStarts S & ends OXA-Z Proximitiesseptation11septations12septavalent16septectomyseptember September Equinox septemfid17septemvir16septemvirate19septemvirates20septemviri17