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