Consortium's rhymes with:
abiam's, aquariums, atriums, auditoriums, axioms, caladiums, condominiums, geraniums, gymnasiums, herbariums, honorariums, idioms, mediums, millenniums, moratoriums, pentiums, petroleum's, podiums, premiums, stadium's, stadiums, symposiums, wiliams, zirconiums
Consortium's sounds like:
consecrations, consorting, consortiums