Here's what rhymes with nonpermutable.
double bubble publ trouble rubble stubble redouble playable addable uncharitable dirigible unbridgeable unlikable beatable tamable unloveable damnable friable translatable untranslatable attachable unnameable vocable unplayable acquirable flyable transmutable conformable imperishable imperturbable nonviable filtrable unarguable containable ignitable compoundable vincible dividable indissoluble exploitable indemonstrable Words that almost rhyme with nonpermutable
puddle tuple couple subtle shuttle muddle rebuttal suppl supple huddle cuddle cudgel rappel fuddle scuttle decouple befuddle uncouple thermocouple 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 grumble scuffle smuggle phrasal reshuffle snaffle snuggle trundle lungful rumple snuffle unbuckle mugful pinocle frontal triumphal colourful crustal nuptial bestowal lustful peduncle trustful crumple nonvocal kerfuffle cupsful conformal suboptimal carbuncle prenuptial duodecimal granduncle prefrontal subcortical antifungal honeysuckle mistrustful heptagonal disgruntle distrustful