Here's what rhymes with lightened.
                        
                        
                    
                                frightened  heightened  brightened  tightened  enlightened  unenlightened  Words that almost rhyme with lightened
ripened  widened  stipend  trident  unripened  strident  island  lighted  likened  livened  cited  diamond  sighted  titled  highland  rifled  rivaled  rivalled  siphoned  wizened  kited  united  delighted  lipid  recited  dialed  enlivened  cycled  trifled  dialled  idled  libelled  libeled  relighted  naiad  spited  heisted  entitled  invited  excited  guided  minded  hybrid  sided  indicted  stifled  recycled  unrivalled  vomited  bridled  farsighted  lifeblood  sidled  stylised  unrivaled  untitled  bedizened  spiraled  tided  spiralled  longsighted  redialed  sniveled  redialled  reminded  provided  divided  unbridled  disunited  jeremiad  unexcited  confided  unguided  broadminded  motorcycled  coincided  unprovided  simpleminded  absentminded