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