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