Here's what rhymes with optian.
                        
                        
                    
                                option  adoption  Words that almost rhyme with optian
godson  flotsam  auction  often  portion  organ  caution  cation  torsion  common  foreign  carbon  cotton  fallen  fortune  garden  margin  sovereign  abortion  bargain  gotten  pardon  foreman  oxen  pollen  rotten  jargon  orphan  shorten  soften  wanton  warden  arson  carton  darken  foremen  harden  hearken  robin  sharpen  sodden  apportion  auxin  bobbin  carmine  cordon  rosin  barman  logon  marten  tartan  warren  hearten  lawman  marlin  martin  oarsman  tarpon  corpsman  harken  barmen  bonbon  gorgon  conman  tauten  doctrine  absorption  horsemen  toxin  broaden  parson  resorption  shotgun  trodden  cauldron  dolphin  horseman  watchman  libation  caldron  spartan  bondman  bondmen  yachtsman  bargeman  coarsen  smarten  sporran  yardman  yardmen  proportion  forgotten  distortion  uncommon  exhaustion  infarction  precaution  befallen  extortion  concoction  herniation  marksman  bondsman  contortion  motorman  toboggan  motormen  reapportion  misfortune  squadron  sportsman  dishearten  longshoreman  cardamon  foreshorten  downtrodden  antiabortion  unforgotten  muskoxen  hydrocarbon  kindergarten  antitoxin  disproportion  radiocarbon  fluorocarbon  misbegotten  calumniation  prekindergarten