Here's what rhymes with knowably.
Words that almost rhyme with knowably
poetry notably openly sociably nosily totally socially locally woefully vocally focally notionally cosily cozily rosily zonally soullessly dozily emotionally hopefully hopelessly potency globally cogency cogently copiously brokenly dolefully immodesty wholesomely immodestly soulfully loathsomely lonesomely atonally probity boastfully protegee twopenny ufology misogamy porosity verbosity leucotomy outspokenly unemotionally antiphonally callosity inconsolably irreproachably antisocially diplomacy laparotomy precocity reproachfully uncontrollably thoracotomy scrupulosity