Here's what rhymes with ondoying.
                        
                        
                    
                                toying  buoying  joying  enjoying  mamboing  employing  annoying  alloying  cloying  decoying  overjoying  deploying  soloing  haloing  stuccoing  videoing  buncoing  discoing  destroying  reemploying  buffaloing  redeploying  Words that almost rhyme with ondoying
doyen  moyen  boiling  joining  toiling  poising  pointing  adjoining  coining  spoiling  voicing  coiling  enjoining  soiling  voiding  broiling  jointing  conjoining  roiling  foiling  moiling  noising  coiffing  coifing  hoicking  avoiding  appointing  rejoicing  hoisting  rejoining  embroiling  foisting  purloining  uncoiling  quoiting  reboiling  anointing  recoiling  despoiling  subjoining  outpointing  charbroiling  disjointing  reappointing  disappointing  counterpointing  reconnoitring