Here's what rhymes with unpreventable.
                        
                        
                    
                                preventable  preventible  presentable  lamentable  Words that almost rhyme with unpreventable
spendable  bendable  dependable  expendable  undependable  amendable  extendable  quenchable  commendable  unquenchable  recommendable  sensible  vegetable  sentinel  festival  respectable  insensible  sceptical  defensible  tenable  testable  tentacle  pentacle  electable  terrible  acceptable  cerebral  flexible  spectacle  susceptible  amenable  parable  perceptible  plentiful  retinal  sectional  sensual  skeptical  comprehensible  detectable  receptacle  seminal  detestable  illegible  ineffable  legible  ostensible  regrettable  reprehensible  bearable  delectable  execrable  indefensible  undetectable  dispensable  extensible  inedible  prophetical  correctable  repairable  wearable  breathable  perfectible  detectible  medical  professional  chemical  accessible  dimensional  exceptional  indispensable  intestinal  credible  decimal  intentional  unacceptable  inflexible  segmental  untenable  attentional  impeccable  trigeminal  digestible  extensional  unprofessional  caramel  processional  collectible  insusceptible  suggestible  collectable  forgettable  recessional  stretchable  weldable  comestible  connectable  spreadable  connectible  conventional  clerical  incredible  inaccessible  textual  directional  pedestal  unbearable  unconventional  correctional  impregnable  unforgettable  chimerical  expressible  indigestible  inflectional  intracerebral  obsessional  contestable  nonprofessional  impressible  inflexional  premedical  perceptional  suppressible  unwearable  numerical  hypothetical  perceptual  biochemical  confessional  contemptible  irrepressible  polemical  unintentional  alchemical  bidirectional  compressible  geochemical  incontestable  twodimensional  anticlerical  concessional  paramedical  unexceptional  conceptional  convectional  subprofessional  noncollectable  gastrointestinal  heterosexual  homosexual  multidimensional  inexpressible  unidirectional  histochemical  photochemical  psychosexual  threedimensional  semiprofessional  complexional  nonclerical  nonnumerical  congressional  incompressible  intertextual  physicochemical  paraprofessional  alphanumerical  immunohistochemical