Here's what rhymes with unflappable.
Words that almost rhyme with unflappable
capital sagittal compatible detachable nondetachable incompatible flammable laughable rational palpable fallible inflammable cannibal passable verapamil blamable chasuble graspable frangible satiable savable national radical valuable casual tangible irrational taxable adaptable fractional implacable infallible mandible clavicle tractable collapsible bankable cantabile nonflammable fanciable practical diagonal invaluable maximal impassable intractable factional impalpable cantonal madrigal merchantable unpractical impassible attractable declarable transnational understandable hexagonal impractical intangible octagonal expandable nontaxable retractable international grammatical multinational interactional lnternational supranational transactional ungrammatical semiannual