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