Here's what rhymes with nonpresuppositional.
                        
                        
                    
                                positional  additional  oppositional  traditional  transitional  volitional  depositional  conditional  compositional  prepositional  propositional  definitional  dispositional  cognitional  nutritional  unconditional  inquisitional  nontraditional  Words that almost rhyme with nonpresuppositional
provisional  divisional  medicinal  fictional  original  syllable  frictional  polygonal  finagle  political  criminal  typical  visible  visual  digital  miracle  aboriginal  occipital  pitiful  pinnacle  thinkable  binnacle  spiracle  tillable  billable  nonfictional  steerable  biddable  fixable  winnable  sinkable  individual  clinical  biblical  mythical  permissible  juridical  pivotal  satirical  unthinkable  despicable  divisible  jurisdictional  derivable  miscible  subclinical  livable  antipodal  unoriginal  pinochle  thimbleful  unsinkable  kissable  refillable  shrinkable  bridgeable  mixable  principle  principal  invisible  reciprocal  admissible  episcopal  hospitable  invincible  transcriptional  biophysical  geophysical  pontifical  quizzical  diacritical  drinkable  printable  resistible  transmittable  unlivable  ignitible  irresistible  predictable  equivocal  explicable  psychophysical  transmissible  forgivable  undrinkable  unprintable  utilisable  extricable  nonrefillable  relivable  municipal  unpredictable  unequivocal  inadmissible  archiepiscopal  unforgivable  astrophysical  nonclinical  nonreciprocal  inexplicable