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