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