Here's what rhymes with overexactness.
                        
                        
                    
                                exactness  compactness  abstractness  Words that almost rhyme with overexactness
vastness  fastness  fatness  sadness  cactus  flatness  factious  slackness  tactless  practice  status  lattice  madness  blackness  frankness  gladness  mattress  hapless  phallus  badness  gratis  mantras  thankless  flatus  fractious  habits  palace  campus  canvas  disastrous  facets  malice  magnets  callous  callus  canvass  hamlets  matchless  backups  classless  hammocks  hatchets  trackless  blankness  captious  faggots  pathless  rackets  shallots  balance  apparatus  planets  barracks  baskets  brackets  pamphlets  patents  rabbits  tablets  ballots  bandits  carrots  landless  banquets  gametes  inhabits  malpractice  reactants  fascists  gadgets  handcuffs  maggots  pallets  savants  benefactress  caliphs  caskets  gallops  gaskets  paddocks  palates  palettes  scallops  tyrannous  talents  blankets  imbalance  enactments  pageants  tangents  bankrupts  casements  catchments  gallants  pianists  fragments  attachments  combatants  digitalis  embankments  instalments  enhancements  unbalance  enchantments  commandments  detachments  advancements  counterbalance  noncombatants  propagandists