Here's what rhymes with nisun.
                        
                        
                    
                                diesen  amphotericin  Words that almost rhyme with nisun
reason  season  lesion  heathen  uneven  reafon  diesem  treason  elision  threesome  adhesion  cohesion  deletion  accretion  artesian  completion  secretion  depletion  repletion  preseason  excretion  postseason  eaten  needn  elan  ian  eon  neaten  didn  region  beaten  demon  seamen  weaken  deacon  deepen  legion  seaman  semen  beacon  renin  daemon  dn  zijn  cheapen  paean  peon  phaeton  wheaten  chieftain  freeman  lndian  chorion  ruffian  sweeten  cretin  unbeaten  pigpen  sequin  steepen  policeman  boolean  freedmen  freedman  collegian  overeaten  plebeian  archdeacon  occafion  protean  fieldsman  polyhedron  plainclothesman  tetrahedron  epicurean