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