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