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