Millenniums rhymes with:
condominiums, geraniums, zirconiums, abiam's, aquariums, atriums, auditoriums, axioms, caladiums, condominiums, consortium's, geraniums, gymnasiums, herbariums, honorariums, idioms, mediums, moratoriums, pentiums, petroleum's, podiums, premiums, stadium's, stadiums, symposiums, wiliams, zirconiums
Millenniums sounds like:
mailing, mailings, malamugi, malanga, malanowski, malinak, malinoski, malinowski, malinski, malone's, mealing, mealynose, mehling, mei-ling, melange, meling, melling, melloan's, mellon's, mellons, mellowing, melnick, melnik, melnyk, melons, milan's, milanowski, milling, millions, milnes, milonas, moholy-nagy, molineaux, molonicks, molyneaux, moneyline's, moulinex, mulanax, mullenax, mullenix, mullens, mullinax, mullineaux, mulling, mullings, mullinix, mullins, mulnix