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