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