Here's what rhymes with unitiveness.
                        
                        
                    
                                forgiveness  Words that almost rhyme with unitiveness
business  stiffness  bismuth  agribusiness  bigness  dimness  witness  thickness  fitness  sickness  richness  stillness  pivots  appearance  minutes  bishops  ambitious  vicious  digits  malicious  tickets  auspicious  citrus  fearless  assiduous  eyewitness  papyrus  pickets  quickness  rivets  billets  discus  officious  pittance  sinless  sinuous  unfitness  beardless  bigots  cirrus  nimbus  pickups  villus  witless  distance  limits  spirits  visits  adherence  mistress  suspicious  delicious  judicious  pernicious  prodigious  admittance  bacillus  biscuits  brilliance  capricious  viscous  grimace  listless  litmus  nutritious  propitious  seditious  strictness  swiftness  thickets  trinkets  eucalyptus  factitious  hillocks  injudicious  repetitious  triplets  litigious  mastitis  riddance  unambitious  wickets  windlass  windless  wingless  religious  assistance  clearance  adherents  fictitious  superstitious  hindrance  pigments  diffidence  elicits  frigates  meniscus  reappearance  reminiscence  avaricious  crickets  cystitis  indigence  irreligious  surreptitious  hibiscus  profitless  snippets  solicits  unpropitious  interference  assistants  disappearance  exhibits  persistence  subsistence  coherence  inhibits  shipments  prestigious  prohibits  archbishops  contingents  distinctness  expeditious  remittance  resistless  existence  resistance  coefficients  commitments  insistence  perseverance  delinquents  adventitious  consistence  incoherence  transmittance  endearments  nonreligious  infringements  nonexistence  coexistence  enlistments  noninterference