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