Here's what rhymes with retardatum.
datum stratum substratum Words that almost rhyme with retardatum
batten madam satin madame fatten latin platen happen hadn cabin haben flatten sadden madden imagine gladden macadam tarmacadam tantum bantam platinum chasm fathom phantom spasm tandem plasm tantrum sachem talcum pablum handsome random maxim ransom magnum sanctum hansom phantasm transom amalgam gladsome sphagnum cytoplasm protoplasm neoplasm nonrandom memorandum enthusiasm iconoclasm