Here's what rhymes with underspend.
                        
                        
                    
                                spend  tend  bend  penned  friend  send  attend  trend  lend  blend  suspend  mend  fend  rend  append  depend  extend  defend  contend  descend  intend  pretend  amend  ascend  dividend  offend  expend  befriend  transcend  commend  comprehend  apprehend  superintend  condescend  recommend  Words that almost rhyme with underspend
spent  bent  bench  tent  stemmed  dent  pent  stench  gent  went  cent  sent  meant  rent  lent  scent  trench  vent  hemmed  temp  wrench  entente  wench  extent  percent  event  condemned  descent  intent  accent  assent  cement  ascent  dissent  repent  underwent  avenge  dreamt  ferment  hemp  quench  indent  prevent  consent  president  revenge  invent  lament  augment  resent  orient  relent  discontent  represent  circumvent  misrepresent  bed  dead  stared  begged  dared  spared  paired  spelled  sped  stead  bared  chaired  ted  pared  pegged  said  head  held  lead  led  read  red  spread  ahead  bread  shared  fed  fled  shed  thread  bred  cared  dread  scared  haired  pledged  tread  yelled  bled  fared  flared  fledged  med  shewed  smelled  swelled  wed  weld  avenged  celled  despaired  dispelled  felled  hedged  shelled  sled  wedged  dredged  laird  shred  unpaired  welled  compared  instead  prepared  alleged  compelled  expelled  impaired  repaired  beheld  centred  squared  upheld  cleansed  glared  impelled  propelled  rebelled  repelled  unprepared  assayed  bedstead  embed  panelled  quelled  shelved  unsaid  unwed  declared  overhead  withheld  excelled  misled  watershed  unimpaired  essayed  handheld  marvelled  outspread  overspread  widespread  overwhelmed  infrared  paralleled  unparalleled  quarrelled