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