Here's what rhymes with polydispersions.
                        
                        
                    
                                versions  excursions  diversions  incursions  inversions  perversions  conversions  Words that almost rhyme with polydispersions
persons  assertions  exertions  insertions  observance  burdens  turbans  churches  journals  sermons  curtains  surgeons  virgins  turtles  circles  determines  colonels  hurdles  kernels  surges  churchwardens  externals  girdles  nurses  verses  referrals  squirrels  tubercles  encircles  rehearsals  reversals  commercials  universals