Here's what rhymes with unadoptable.
                        
                        
                    
                                adoptable  Words that almost rhyme with unadoptable
portable  possible  particle  topical  adorable  supportable  unstoppable  soluble  cortical  horrible  plausible  anatomical  doctrinal  constable  forcible  nautical  apocryphal  chargeable  torsional  insupportable  voluble  barnacle  solvable  fontanel  tortoiseshell  washable  importable  lockable  impossible  probable  abdominal  nominal  proximal  affordable  carnival  follicle  laudable  corpuscle  farcical  exportable  unsolvable  exhaustible  fordable  monocle  purchasable  coracle  equatable  karakul  watchable  responsible  remarkable  marginal  proportional  cardinal  canonical  insoluble  irresponsible  phenomenal  allegorical  conjugal  deplorable  inexhaustible  methodical  carbonyl  enforceable  implausible  oratorical  inaudible  unenforceable  unremarkable  resolvable  transportable  rechargeable  antiparticle  chlorophyl  insolvable  nonenforceable  revolvable  nonchargeable  hierarchical  improbable  orthogonal  aeronautical  pronominal  tetragonal  submarginal  rhapsodical  enlargeable  etymological  oligarchical  gemological  anthropological  cytological  scatological  disproportional  seismological  gemmological  cosmological  entomological  phantasmagorical  gerontological  epistemological