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