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