Here's what rhymes with introituum.
boom tomb doom whom room bloom womb broom loom plume zoom rheum assume resume gloom presume groom fume flume abloom entomb costume perfume residuum suum subsume legroom foredoom consume elbowroom boxroom exhume strongroom Words that almost rhyme with introituum
tune boon doin dune soon moon noon spoon platoon foon coon prune loon rune attune goon shoon balloon hewn lagoon shewn strewn toluene baboon buffoon maroon pontoon raccoon swoon typhoon bassoon dragoon tycoon croon importune jejune lampoon racoon immune cartoon saloon cocoon opportune aucune harpoon impugn inopportune festoon spittoon doubloon patroon poltroon protozoon bestrewn afternoon monsoon tablespoon forenoon picayune macaroon honeymoon dessertspoon spermatozoon trinitrotoluene