Here's what rhymes with nilgais.
                        
                        
                    
                                gay  k  kc  cay  they  may  day  way  say  pay  re  lay  j  array  bay  clay  gray  grey  ray  che  hay  nay  okay  weigh  fay  fe  yea  dey  hey  ley  ok  rei  sei  whey  bk  jay  lei  payee  rea  rj  tae  wei  bey  neigh  fey  roue  shay  away  play  stay  decay  essay  obey  pray  prey  cafe  repay  sway  tray  fray  oj  slay  allay  bouquet  ij  sleigh  bj  drei  fj  tj  tre  zwei  bray  croquet  dray  flay  parquet  risque  brae  inveigh  airplay  moray  nisei  trey  aurae  briquet  reweigh  spay  aweigh  copay  today  delay  survey  anyway  convey  everyday  spray  ballet  betray  dismay  stray  valet  cliche  defray  disarray  fillet  passe  cabaret  emigre  gangway  naturae  nebulae  puree  replay  saute  alleyway  crochet  belay  filet  ricochet  splay  prepay  purvey  sachet  sorbet  soubriquet  toupee  hooray  noway  sickbay  urethrae  hurray  layaway  medullae  misplay  tearaway  display  holiday  halfway  portray  astray  runaway  underway  attache  disobey  faraway  lamellae  overlay  dossier  francais  matinee  microarray  toothache  underlay  breakaway  getaway  lingerie  sobriquet  soiree  souffle  wordplay  workaday  caraway  fibulae  giveaway  throwaway  byplay  pleurae  resurvey  stingray  flyaway  macrame  overpay  caesurae  outplay  outstay  umbrae  underpay  walkaway  respray  yesterday  interplay  naivete  papillae  protege  sequelae  waterway  fistulae  maxillae  carriageway  castaway  hideaway  patellae  stowaway  takeaway  underplay  overplay  overstay  roundelay  uvulae  bobsleigh  copulae  foldaway  formulae  vertebrae  communique  passageway  societe  scapulae  straightaway  cabriolet  cybercafe  penumbrae  trabeculae  salmonellae  tarantulae  companionway  caravanserais