Here's what rhymes with unpossessiveness.
                        
                        
                    
                                possessiveness  obsessiveness  aggressiveness  oppressiveness  impressiveness  progressiveness  expressiveness  repressiveness  Words that almost rhyme with unpossessiveness
offensiveness  festiveness  defensiveness  perceptiveness  restiveness  pensiveness  effectiveness  attentiveness  tenseness  defectiveness  deceptiveness  denseness  inoffensiveness  scarceness  inventiveness  ineffectiveness  suggestiveness  extensiveness  protectiveness  receptiveness  apprehensiveness  celibates  expensiveness  intensiveness  objectiveness  caribous  comprehensiveness  penitence  reticence  connectedness  headmistress  hesitance  inattentiveness  retentiveness  fetishists  inexpensiveness  residence  unexpectedness  contentedness  residents  collectivists  disconnectedness  embellishments  counterintelligence