Here's what rhymes with characteristicity.
                        
                        
                    
                                felicity  plasticity  rusticity  simplicity  elasticity  publicity  toxicity  domesticity  infelicity  electricity  specificity  complicity  eccentricity  periodicity  catholicity  egocentricity  Words that almost rhyme with characteristicity
activity  nativity  festivity  captivity  relativity  negativity  declivity  acclivity  conductivity  creativity  selectivity  proclivity  productivity  insensitivity  exclusivity  radioactivity  superconductivity  ability  dignity  fertility  tyranny  bigotry  agility  distally  rickety  trinity  cheerily  virility  bigamy  billowy  timothy  explicitly  hostility  mobility  utility  validity  vicinity  affinity  divinity  implicitly  nobility  symmetry  cheerfully  infinity  rapidity  rigidity  viability  acidity  busily  civility  futility  minutely  salinity  simile  solidity  timidity  debility  ductility  epitome  fixity  fluidity  fragility  indignity  litany  prettily  sublimity  timidly  turbidity  blissfully  distantly  docility  senility  servility  villainy  dismally  frigidity  tearfully  wittily  dizzily  finicky  fiscally  scurrility  stolidity  willowy  possibility  sympathy  differently  ministry  antiquity  capability  conspiracy  proximity  feasibility  humidity  morbidity  visually  antipathy  asymmetry  liquidity  skillfully  symphony  volatility  fearfully  polygamy  sociability  versatility  wilfully  wistfully  admissibility  epiphany  fitfully  invalidity  ritually  signally  willfully  divisibility  flippancy  guiltily  legibility  placidity  prolixity  aborigine  abysmally  flippantly  privily  efficiency  probability  availability  flexibility  initially  efficiently  officially  applicability  inherently  visibly  vividly  brilliancy  brilliantly  chivalry  facsimile  femininity  indifferently  indignantly  irritability  persistently  fearlessly  soliloquy  amiability  hospitably  inaccessibility  insistently  invisibility  judicially  listlessly  practicability  reversibility  stringency  viciously  polyphony  stringently  auspiciously  diffidently  invincibly  negotiability  responsibility  sufficiently  consistently  deficiency  consistency  reliability  sufficiency  susceptibility  tranquillity  acceptability  adaptability  compatibility  intermittently  religiously  unanimity  alkalinity  assiduously  irresistibly  irresponsibility  magnanimity  predictably  suspiciously  calligraphy  deliciously  exigency  inviolability  invisibly  resiliency  unofficially  affordability  coherency  indivisibility  malleability  minstrelsy  quizzically  ambitiously  artificially  contingency  delinquency  insufficiency  masculinity  proficiency  inefficiency  malignancy  superficially  insufficiently  surreptitiously  beneficially  expeditiously  improbability  inexplicably  contingently  incoherently  inefficiently  pusillanimity  unpredictably  inconsistency  impracticability  inconsistently  immunodeficiency