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