Here's what rhymes with trappan.
                        
                        
                    
                                happen  Words that almost rhyme with trappan
platen  atom  hadn  cabin  satin  haben  fatten  flatten  batten  gladden  sadden  madden  imagine  stratum  datum  madam  madame  macadam  substratum  tarmacadam  dragon  ration  ashen  aspen  blacken  bracken  action  fashion  passion  captain  barren  cannon  canon  famine  wagon  chaplain  gallon  salmon  traction  actin  anion  baron  fasten  caption  admin  dampen  plantain  slacken  flagon  mammon  talon  gammon  trashcan  adman  admen  ashcan  raglan  reaction  attraction  fraction  faction  mansion  assassin  canyon  bastion  canton  falcon  plankton  saffron  hangman  jasmine  madmen  waxen  adaption  amnion  banyan  capstan  chanson  flaxen  refashion  triathlon  damson  klaxon  badman  badmen  flashgun  gasman  refasten  abandon  grandson  sanction  battalion  diffraction  inaction  retraction  prolactin  stallion  draftsman  draughtsman  redaction  clansmen  contraption  detraction  draftsmen  handgun  batsman  diapason  dispassion  landsman  scansion  unfasten  clansman  gravamen  scallion  taxman  gyrfalcon  taxmen  sandmen  interaction  transaction  abstraction  compassion  contraction  extraction  refraction  craftsman  distraction  subtraction  exaction  infraction  medallion  reexamine  protraction  pentathlon  upperclassman  bandsman  expansion  companion  compaction  phytoplankton  rarefaction  benefaction  counteraction  stupefaction  overreaction  petrifaction  rapscallion  underclassman  malefaction  vitrifaction  satisfaction  liquefaction  putrefaction  dissatisfaction