Here's what rhymes with oprional.
                        
                        
                    
                                tonal  zonal  coronal  clonal  atonal  polyclonal  antiphonal  monoclonal  Words that almost rhyme with oprional
chamomile  calomel  social  local  total  noble  focal  mobile  vocal  modal  nodal  foetal  motile  sociale  woeful  mogul  yodel  bowlful  global  proposal  coastal  hopeful  postal  immobile  doleful  prosocial  asocial  ennoble  soulful  reposeful  disposal  antisocial  mucosal  ignoble  boastful  mongrel  patrimonial  reproachful  sacerdotal  scrotal  unsocial  asphodel  anecdotal  multimodal  ambrosial  nonsocial  psychosocial  synagogal