Here's what rhymes with certainable.
                        
                        
                    
                                attainable  ascertainable  trainable  obtainable  sustainable  unattainable  unobtainable  maintainable  explainable  unsustainable  Words that almost rhyme with certainable
claimable  irreclaimable  reclaimable  payable  changeable  bailable  capable  traceable  saleable  salable  breakable  available  operational  debatable  unchangeable  subnational  repayable  assailable  erasable  aberrational  gradable  occasional  incapable  vocational  insatiable  interchangeable  rotational  situational  unavailable  vibrational  foundational  exchangeable  ideational  unassailable  unshakable  replaceable  unbreakable  unshakeable  degradable  unsaleable  untraceable  unsalable  mistakable  persuadable  embraceable  nonbreakable  resalable  educational  relational  unmistakable  informational  observational  sensational  generational  gestational  irreplaceable  locational  variational  inflatable  mutational  avocational  invitational  conveyable  probational  occupational  gravitational  conversational  inescapable  motivational  conformational  inspirational  navigational  associational  nonoperational  nonexchangeable  computational  recreational  translational  biodegradable  correlational  coeducational  noneducational  nonvocational  microwavable  noninterchangeable  denominational  congregational  intergenerational  transformational  confrontational  nonoccupational  organizational  organisational  representational  improvisational  interdenominational  nondenominational  nonrepresentational