Here's what rhymes with knownen.
                        
                        
                    
                                phonon  Words that almost rhyme with knownen
omen  nomen  roman  yeoman  showman  bowmen  bowman  showmen  snowmen  abdomen  cognomen  crossbowmen  crossbowman  businesswomen  upperclasswomen  open  motion  notion  ocean  aucun  oaken  oaten  chosen  emotion  colon  shouldn  token  woven  molten  lotion  olden  potion  woken  shogun  rowan  bosun  cozen  wonton  broken  spoken  frozen  golden  erosion  stolen  corrosion  slogan  swollen  commotion  coachman  holden  reopen  boatman  cloven  roentgen  coachmen  demotion  awoken  sloven  stolon  blowgun  popgun  brogan  devotion  promotion  unbroken  unspoken  homespun  postman  betoken  implosion  embolden  cabochon  kiloton  verboten  rewoven  spokesman  interwoven  locomotion  outspoken  beholden  bespoken  handwoven  refrozen  misspoken  explosion  hemoglobin  oxytocin  plainspoken  ibuprofen  protozoan