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