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