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