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