Cardizem rhymes with:
alem, behm, bem, blehm, brehm, brem, chem, clem, condemn, dehm, demme, em, emme, femme, fm, gehm, gem, gemme, hem, hemm, hemme, imm, jem, kehm, kem, khem, klem, klemm, klemme, lem, lemm, m, m., mgm, p.m., pgm, phlegm, pm, ppm, prem, rehm, rem, remme, rhem, rpm, schemm, schwemm, stem, stemm, swem, temme, them
Cardizem sounds like:
cardigan, cartagena, cartesian, carthaginian, cordesman, cortisone, cretchen, criticism