Here's what rhymes with irregular.
                        
                        
                    
                                regular  Words that almost rhyme with irregular
secular  molecular  specular  nonsecular  intermolecular  intramolecular  macromolecular  cellular  wrestler  nebular  leveler  leveller  reveller  reveler  recolor  settler  wretcheder  carefuller  restfuller  creditor  senator  testator  mariner  predator  pensioner  embezzler  freshener  temperature  messenger  intracellular  developer  executor  intercellular  separator  stepmother  investiture  pleasanter  presenter  questioner  subcellular  unicellular  inheritor  derringer  seconder  headhunter  strengthener  telemeter  expenditure  multicellular  celebrator  competitor  extracellular  antechamber  commemorator  hepatocellular  primogeniture  confectioner