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