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