Concessionaire rhymes with:
nationair, billionaire, debonair, doctrinaire, millionaire, multimillionaire, nationair, questionnaire, billionaire, debonair, doctrinaire, ensnare, finnair, glenayre, knerr, macnair, mcnair, millionaire, multimillionaire, nair, nationair, ne'er, questionnaire, snare
Concessionaire sounds like:
canzoneri, commissioner, concessionary, consumer