Here's what rhymes with customizing.
                        
                        
                    
                                rising  arising  ionizing  sizing  atomizing  carbonizing  itemizing  tyrannizing  urbanizing  uprising  advising  analysing  compromising  devising  supervising  colonizing  modernizing  optimizing  summarizing  authorising  baptizing  fertilizing  catalyzing  chastising  galvanizing  paralysing  summarising  apprising  feminizing  fraternizing  sermonizing  verbalizing  vitalizing  catalysing  catechizing  demonizing  idolizing  prising  prizing  advertising  surprising  analyzing  comprising  organizing  utilizing  authorizing  maximizing  minimizing  oxidizing  revising  stabilizing  theorizing  civilizing  merchandising  mobilizing  patronizing  socializing  specializing  symbolizing  capitalizing  categorizing  crystallizing  despising  disguising  energizing  harmonizing  jeopardizing  memorizing  paralyzing  polarizing  scrutinizing  sterilizing  sympathizing  tantalizing  appetizing  digitizing  economizing  fantasizing  globalizing  homogenizing  humanizing  immunizing  temporizing  terrorizing  theorising  aggrandizing  capsizing  finalizing  hybridizing  hydrolyzing  penalizing  pulverizing  satirizing  vaporizing  vocalizing  amortizing  anodizing  appetising  baptising  empathizing  epitomizing  hypnotizing  mechanizing  memorising  merchandizing  pasteurizing  sanitizing  scandalizing  televising  temporising  unappetizing  womanizing  exercising  recognizing  emphasizing  criticizing  enterprising  practising  generalizing  neutralizing  synthesizing  apologizing  centralizing  equalizing  legitimizing  liberalizing  localizing  magnetizing  moralizing  rationalizing  sensitizing  standardizing  subsidizing  synchronizing  visualizing  actualizing  antagonizing  dramatizing  evangelizing  formalizing  improvising  legalizing  metabolizing  monopolizing  nationalizing  publicizing  revitalizing  stigmatizing  systematizing  unsurprising  brutalizing  eulogizing  exorcising  hypothesizing  immobilizing  magnetising  marginalizing  mesmerizing  naturalizing  personalizing  privatizing  anesthetizing  categorising  commercializing  dramatising  metastasizing  moisturizing  plagiarizing  polarising  polymerizing  pressurizing  sensitising  solemnizing  stigmatising  traumatizing  unionizing  vulcanizing  conceptualizing  demoralizing  destabilizing  normalizing  philosophizing  reorganizing  dehumanizing  depolarizing  externalizing  internalizing  popularizing  prioritizing  proselytizing  disorganizing  familiarizing  initializing  politicizing  proselytising  romanticizing  secularizing  criminalizing  mythologizing  popularising  radicalizing  trivializing  unenterprising  characterizing  industrializing  decentralizing  democratizing  revolutionizing  demagnetizing  materializing  tranquilizing  depersonalizing  desensitizing  memorializing  overemphasizing  prioritising  professionalizing  propagandizing  regularizing  tranquillizing  individualizing  contextualizing  editorializing  particularizing  sentimentalizing  intellectualizing  internationalizing  Words that almost rhyme with customizing
knifing  arriving  diving  writhing  conniving  tithing  dicing  driving  striving  surviving  deriving  pricing  thriving  enticing  splicing  slicing  depriving  reviving  contriving  sacrificing  apprenticing  streptomycin  mining  knighting  writing  dying  fighting  lying  buying  firing  riding  smiling  deciding  denying  dining  filing  guiding  hiding  lighting  lining  shining  timing  abiding  admiring  assigning  biting  citing  hiring  liking  signing  typing  piling  piping  tying  undermining  wiping  wiring  dyeing  hiking  rhyming  siding  sighing  sighting  tiring  undying  untiring  whining  alighting  aligning  divining  minding  pining  righting  siting  vying  biding  biking  chiding  fining  liming  sniping  whiting  shying  viking  seining  tiding  wining  finding  trying  binding  providing  striking  underlying  applying  crying  defining  flying  acquiring  climbing  combining  designing  dividing  drying  lightning  sliding  winding  inviting  refining  uniting  ageing  aspiring  confining  frying  gliding  justifying  obliging  compiling  confiding  defying  edifying  inciting  plying  priming  prying  spying  striding  underwriting  beguiling  bribing  certifying  colliding  delighting  igniting  perspiring  styling  twining  underlining  blighting  griping  hireling  rifling  slighting  spiking  unsmiling  unwinding  acidifying  belying  deriding  indicting  ossifying  bandying  debiting  deifying  eliding  maligning  opining  exciting  declining  occupying  supplying  gratifying  grinding  implying  inspiring  modifying  presiding  relying  reminding  residing  retiring  specifying  terrifying  trifling  blinding  classifying  overlying  overriding  reciting  ascribing  coinciding  complying  conspiring  horrifying  inclining  resigning  rewriting  stifling  testifying  verifying  amplifying  disliking  fancying  notifying  ratifying  subsiding  decrying  expediting  mystifying  pacifying  repining  reuniting  stupefying  subdividing  uninviting  calcifying  codifying  enshrining  exiling  overwriting  typifying  unedifying  unexciting  describing  satisfying  multiplying  clarifying  qualifying  reconciling  replying  signifying  unifying  expiring  magnifying  purifying  reclining  simplifying  stereotyping  subscribing  fortifying  glorifying  prophesying  quantifying  rectifying  redefining  sanctifying  transcribing  falsifying  inscribing  intertwining  nullifying  redesigning  solidifying  stultifying  uninspiring  vivifying  crucifying  fructifying  nonbinding  personifying  ramifying  recombining  vilifying  identifying  prescribing  diversifying  mortifying  unsatisfying  beautifying  circumscribing  emulsifying  objectifying  liquefying  proscribing  putrefying  intensifying  exemplifying  electrifying  indemnifying  disqualifying  oversimplifying