Here's what rhymes with forgetable.
double bubble publ trouble rubble stubble playable acquirable addable dirigible redouble attachable unplayable beatable tamable damnable friable filtrable vocable ignitable flyable vincible uncharitable unbridgeable nonviable unnameable containable unlikable dividable unloveable conformable imperturbable exploitable unarguable compoundable imperishable indissoluble translatable transmutable untranslatable indemonstrable Words that almost rhyme with forgetable
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 crumble ductile rumble rustle shuffle stumble ductal grumble 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 crustal scuffle smuggle phrasal crumple snaffle snuggle trundle lungful rumple snuffle mugful kerfuffle pinocle frontal triumphal colourful nuptial subcortical bestowal lustful peduncle suboptimal carbuncle trustful reshuffle nonvocal cupsful conformal honeysuckle prenuptial granduncle heptagonal prefrontal antifungal duodecimal disgruntle distrustful mistrustful