Here's what rhymes with addtional.
tunnel tional funnel runnel gunnel heptagonal Words that almost rhyme with addtional
pummel tamale suboptimal duodecimal double bundle bubble puzzle bustle buckle chuckle puddle publ tuple juggle tussle tousle beatable trouble couple muscle subtle jungle muzzle rubble shovel shuttle tumble autumnal ductile jumble muddle rustle shuffle stubble suppl supple ductal hovel huddle hustle knuckle muffle mussel ruffle cuddle cudgel dirigible pustule redouble suckle bumble caecal decouple rappel truffle trundle bungle guzzle nuzzle playable truckle duckbill fuddle jugful tubful addable struggle humble frontal fungal nuptial rebuttal rumble stumble bestowal peduncle scuffle scuttle smuggle subtile fumble mumble phrasal reshuffle snaffle snuggle attachable befuddle lungful rumple snuffle unbuckle gumball tumbrel mugful tamable pinocle triumphal colourful crumble crustal prefrontal conformal damnable friable grumble lustful uncharitable trustful unbridgeable crumple prenuptial uncouple vocable unplayable acquirable flyable vincible dividable kerfuffle cupsful subcortical honeysuckle imperturbable carbuncle nonviable filtrable unnameable containable ignitable nonvocal unlikable compoundable oversubtle unloveable disgruntle conformable antifungal distrustful thermocouple exploitable granduncle imperishable mistrustful translatable unarguable indissoluble untranslatable transmutable indemonstrable