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