Here's what rhymes with oratum.
erratum Words that almost rhyme with oratum
button mutton glutton piton sudden globin bludgeon dudgeon nubbin dubbin exciton unbutton scutcheon androgen escutcheon bellybutton custom caecum accustom buxom buncombe bunkum dumdum cementum humdrum jejunum colostrum corundum secundum carborundum conundrum