Here's what rhymes with underselling.
                        
                        
                    
                                selling  felling  shelling  telling  spelling  swelling  smelling  yelling  welling  panelling  dwelling  labelling  repelling  propelling  channelling  dispelling  excelling  marvelling  quelling  tunnelling  compelling  expelling  indwelling  impelling  paralleling  rebelling  retelling  bestselling  foretelling  grovelling  quarrelling  storytelling  Words that almost rhyme with underselling
sharing  herring  bearing  wearing  caring  daring  staring  tearing  pairing  sparing  swearing  flaring  paring  scaring  baring  despairing  glaring  squaring  unsparing  blaring  uncaring  comparing  preparing  declaring  repairing  impairing  overbearing  forbearing  setting  helping  assessing  heading  possessing  shedding  hedging  fetching  shelving  getting  reading  affecting  sending  wedding  ascending  checking  letting  melting  begging  offending  sensing  stepping  sweating  welding  alleging  bedding  fencing  guessing  professing  smelting  stemming  upsetting  wetting  wrestling  avenging  betting  fledgling  netting  perfecting  sketching  threading  threshing  unerring  vesting  abetting  besetting  delving  fretting  messing  pecking  petting  vending  venting  vexing  wrecking  assenting  beheading  belching  belting  decking  fending  gelding  meshing  pegging  pelting  penning  retching  scenting  shredding  webbing  wedging  yelping  testing  accepting  attending  blessing  pressing  resting  spending  spreading  addressing  bending  defending  descending  directing  dressing  lending  stretching  tending  forgetting  pending  amending  arresting  dissenting  effecting  intersecting  nesting  stressing  caressing  confessing  dissecting  dredging  mending  pledging  rending  renting  treading  unending  annexing  attesting  begetting  dreading  flexing  intercepting  jesting  nestling  offsetting  oppressing  undressing  wrenching  appending  bisecting  dissembling  divesting  necking  resetting  trekking  wending  wresting  depending  attempting  collecting  presenting  connecting  interpreting  overwhelming  preventing  protecting  reflecting  selecting  blending  cleansing  commencing  correcting  depressing  detecting  distressing  excepting  investing  projecting  refreshing  tempting  condemning  dispensing  electing  erecting  inventing  manifesting  perplexing  progressing  protesting  suppressing  compressing  condescending  consenting  embedding  impressing  infecting  lamenting  objecting  quenching  suspecting  suspending  transcending  unsuspecting  cementing  clenching  commending  deflecting  digesting  drenching  fermenting  privileging  resenting  trending  unbending  coalescing  ejecting  molesting  prepossessing  questing  regressing  trenching  unprepossessing  wellspring  expressing  extending  respecting  suggesting  expecting  implementing  contending  impending  intending  neglecting  pretending  rejecting  comprehending  inspecting  subjecting  apprehending  condensing  contesting  injecting  orienting  prospecting  unrelenting  complementing  exempting  expending  regretting  repressing  acquiescing  representing  requesting  recommending  interconnecting  recollecting  multiplexing  superintending  experimenting