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