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