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