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