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