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