Here's what rhymes with commutandum.
tandem random memorandum nonrandom Words that almost rhyme with commutandum
abandon tantum bantam phantom canton dampen plantain zooplankton phytoplankton handsome datum madam ransom madame tantrum hansom transom talcum pablum maxim platinum amalgam chasm fathom spasm magnum plasm macadam sachem stratum neoplasm phantasm gladsome sphagnum sanctum tarmacadam cytoplasm substratum iconoclasm enthusiasm protoplasm