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