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