Denominator rhymes with:
exterminator, illuminator, terminator, coordinator, detonator, exterminator, illuminator, originator, procrastinator, terminator
Denominator sounds like:
d'andrea, dandrea, deandrea, demeter, demetre, demetria, demetrio, demetriou, denature, denture, detonator, dewinter, diameter, dimitri, dmitri, domtar, donder, dondero, dundore, dynamometer