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