Here's what rhymes with relaxivity.
                        
                        
                    
                                inactivity  passivity  emissivity  reflexivity  impassivity  objectivity  infectivity  interactivity  positivity  transitivity  sensitivity  connectivity  hyperactivity  receptivity  subjectivity  Words that almost rhyme with relaxivity
ethnicity  authenticity  duplicity  multiplicity  synchronicity  civilly  avidity  flaccidity  rancidity  facility  sterility  virginity  lucidity  fittingly  hillbilly  uncivilly  searingly  stability  typically  liability  humility  willingly  rigidly  anonymity  iniquity  motility  stupidity  mimicry  tranquility  affability  cupidity  wickedly  cyclically  wittingly  audibility  incivility  irascibility  lyrically  sneeringly  chillingly  frigidly  puerility  thrillingly  gimmickry  likability  likeability  limpidity  winningly  tepidity  skittishly  arability  piggishly  inability  disability  variability  visibility  accessibility  admittedly  durability  infertility  suitability  equanimity  immobility  usability  fallibility  gentility  readability  rhythmically  ubiquity  gullibility  mystically  whimsically  cryptically  flammability  insipidity  miscibility  officiously  piercingly  pliability  tractability  atypically  equability  livability  torpidity  edibility  forbiddingly  risibility  befittingly  idyllically  inimically  liveability  stiltedly  cliquishly  principally  instability  sensibility  credibility  impossibility  analytically  convincingly  eligibility  exquisitely  plausibility  unwittingly  advisability  excitability  infallibility  unwillingly  culpability  immutability  inflexibility  intrepidity  mutability  portability  derisively  separability  serviceability  unthinkingly  elliptically  fusibility  holistically  intractability  juridically  serendipity  terrifically  curability  impassibility  ineffability  inflammability  navigability  provability  tenability  bewitchingly  horrifically  immovability  inexorability  notability  pacifically  untypically  agonisingly  aphoristically  avariciously  egoistically  inaudibility  potability  venerability  useability  quotability  insistingly  specifically  desirability  permeability  profitability  vulnerability  realistically  artistically  comparability  insensibility  judiciously  linguistically  maliciously  predictability  convertibility  prodigiously  stylistically  unreliability  capriciously  invincibility  marketability  submissively  unflinchingly  unremittingly  unsuitability  amenability  changeability  dismissively  heuristically  implausibility  logistically  unconvincingly  vindictively  habitability  impregnability  incredibility  ineligibility  invariability  manageability  unstintingly  attainability  egotistically  memorability  permissively  reputability  destructibility  legalistically  marriageability  surrealistically  apolitically  domineeringly  lubriciously  instinctively  distinctively  inevitability  respectability  sustainability  intelligibility  reproducibility  dependability  digestibility  unavailability  descriptively  euphemistically  inseparability  invulnerability  maneuverability  perfectibility  suggestibility  impermeability  injudiciously  prolifically  simplistically  undesirability  altruistically  fatalistically  inadvisability  inalienability  incorrigibility  manoeuvrability  restrictively  prescriptively  unblinkingly  patronymically  characteristically  incompatibility  interoperability  unrealistically  indestructibility  opportunistically  anachronistically  antagonistically  idealistically  inconceivability  penetrability  impressionability  nonavailability  patronisingly  demonstrability  moralistically  unpredictability  indispensability  interchangeability  impenetrability  psychoanalytically  materialistically  capitalistically  incontestability  imperialistically  uncharacteristically  biodegradability