Ardoin rhymes with:
beaudoin, boudoin, bowdoin, chaudoin, jodoin, adjoin, aucoin, beaudoin, boudoin, bourgoin, bowdoin, boyne, broin, burgoyne, chaudoin, chicoine, coin, conjoin, coyne, des_moines, enjoin, goin, goyne, groin, hoyne, jodoin, join, lemoine, leoine, loin, mccoin, mcgloin, micoin, purloin, raboin, rejoin
Ardoin sounds like:
aardema, aerodyne, airtime, ardeen, arden, ardene, ardin, ardine, ardoyne, arduini, aretina, ariadne, arrhythmia, artino, artman, arton