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