Here's what rhymes with underating.
                        
                        
                    
                                waiting  dating  rating  mating  plating  weighting  hating  baiting  gating  antedating  plaiting  operating  awaiting  generating  stating  debating  grating  mediating  undulating  updating  animating  decorating  skating  bleating  dilating  moderating  narrating  negating  abating  actuating  creating  relating  indicating  separating  dominating  activating  educating  elevating  emanating  imitating  irritating  liberating  motivating  radiating  terminating  agitating  allocating  equating  meditating  mitigating  modulating  nominating  oscillating  annihilating  dedicating  delegating  deviating  dissipating  germinating  intimating  irrigating  perforating  permeating  saturating  tolerating  automating  collating  deflating  desolating  enervating  inflating  innovating  nauseating  obviating  scintillating  situating  undeviating  alternating  fascinating  penetrating  advocating  cultivating  devastating  estimating  illustrating  initiating  integrating  originating  accommodating  anticipating  associating  compensating  complicating  cooperating  culminating  insulating  isolating  aggravating  alleviating  assimilating  captivating  collaborating  commemorating  designating  elaborating  escalating  evaporating  hesitating  intimidating  invigorating  navigating  officiating  regenerating  suffocating  validating  aggregating  ameliorating  conciliating  degenerating  deliberating  delineating  deprecating  emigrating  emulating  enumerating  implicating  interrogating  obliterating  postulating  recreating  reiterating  vacillating  ventilating  vindicating  adjudicating  attenuating  corroborating  denigrating  enunciating  hibernating  instigating  masturbating  mutilating  percolating  perpetrating  relegating  renovating  resonating  restating  ruminating  subjugating  unhesitating  urinating  circulating  demonstrating  evaluating  regulating  stimulating  concentrating  contemplating  eliminating  illuminating  incorporating  negotiating  translating  accelerating  appreciating  celebrating  deteriorating  fluctuating  graduating  manipulating  propagating  alienating  appropriating  debilitating  disseminating  exaggerating  exhilarating  lubricating  necessitating  perpetuating  proliferating  simulating  speculating  contaminating  duplicating  eradicating  exasperating  excavating  fabricating  incubating  legislating  legitimating  liquidating  replicating  segregating  stipulating  amalgamating  authenticating  confiscating  consecrating  dissociating  emancipating  fulminating  gravitating  impersonating  inactivating  inaugurating  interpolating  menstruating  preponderating  promulgating  prostrating  recuperating  reinstating  remonstrating  reverberating  supplicating  tabulating  underestimating  calculating  communicating  participating  facilitating  investigating  accumulating  coordinating  differentiating  formulating  humiliating  intoxicating  precipitating  articulating  congratulating  consolidating  predominating  elucidating  evacuating  exterminating  incriminating  refrigerating  repudiating  subordinating  accentuating  coagulating  depreciating  encapsulating  exacerbating  explicating  extenuating  extricating  infuriating  ingratiating  inoculating  invalidating  discriminating  approximating  disintegrating  reciprocating  incapacitating  recirculating  rehabilitating  substantiating  excruciating  electroplating  extrapolating  Words that almost rhyme with underating
trading  shaping  fading  raging  gaping  lading  shading  raiding  wading  waging  gauging  paging  parading  raping  taping  braiding  draping  engaging  grading  staging  pervading  evading  upbraiding  escaping  invading  degrading  persuading  scraping  upgrading  blockading  reshaping  cascading  crusading  masquerading  downgrading  disengaging  making  taking  saying  training  breaking  painting  playing  raising  facing  laying  paying  placing  saving  failing  gaining  naming  praying  sailing  shaking  weighing  baking  bathing  blazing  gazing  racing  tracing  waking  wasting  waving  basing  blaming  bracing  casing  chasing  draining  fainting  gaming  mailing  pacing  paving  praising  railing  raining  reigning  shaving  tasting  trailing  wailing  waning  braking  raking  raving  whaling  chafing  chaining  feigning  hailing  nailing  pasting  phasing  plaything  preying  tailing  taming  veiling  bailing  basting  baying  braving  braying  caving  faking  haying  hazing  maiming  neighing  plaguing  shaming  waiving  changing  obtaining  ranging  undertaking  amazing  claiming  pertaining  staying  arranging  attaining  complaining  embracing  framing  grazing  modelling  scaling  spacing  staining  behaving  craving  decaying  delaying  detailing  flaming  obeying  spraying  straining  swaying  appraising  glazing  phrasing  scathing  slaying  unavailing  unfailing  assailing  availing  awaking  debasing  detaining  effacing  erasing  flaking  quaking  staking  straying  unveiling  allaying  assaying  bewailing  buffeting  craning  flailing  graying  strafing  containing  remaining  maintaining  prevailing  replacing  retaining  conveying  engraving  entertaining  surveying  ascertaining  betraying  unchanging  appertaining  constraining  mistaking  partaking  regaining  retraining  abstaining  acquainting  curtailing  disobeying  entailing  inhaling  interlacing  remaking  renaming  repaying  declaiming  defraying  denaturing  disdaining  inflaming  ordaining  retracing  revelling  explaining  displaying  sustaining  campaigning  proclaiming  restraining  countervailing  displacing  portraying  forsaking  mainspring  overtaking  paraphrasing  rearranging  reclaiming  refraining  remodelling  disclaiming  interchanging  uncomplaining  exchanging  exclaiming  overgrazing