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