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