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