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