Here's what rhymes with whenever.
                        
                        
                    
                                never  wherever  endeavor  endeavour  lever  whichever  sever  however  whatever  forever  clever  whoever  soever  whomever  whensoever  whatsoever  whosoever  howsoever  wheresoever  whomsoever  Words that almost rhyme with whenever
measure  nether  whether  weather  leather  leisure  lesser  feather  heather  lessor  tether  zephyr  guesser  pressure  pleasure  treasure  assessor  dresser  fresher  presser  thresher  together  possessor  aggressor  confessor  oppressor  depressor  refresher  professor  successor  displeasure  compressor  suppressor  intercessor  altogether  predecessor  acupressure  countermeasure  transgressor  metre  better  letter  member  terror  pepper  seller  bearer  cellar  debtor  tenor  beggar  header  ledger  teller  fairer  feller  impeller  leper  nectar  rarer  wearer  checker  fetter  redder  setter  wetter  carer  metier  sharer  bettor  cheddar  wrecker  deader  lecher  meddler  mender  center  remember  centre  gender  sector  gesture  lecture  render  shelter  temper  tender  vector  venture  tenure  censure  helper  inventor  investor  sensor  vendor  censor  lender  rector  sender  stellar  sweater  tremor  ureter  denser  denture  dweller  elector  engender  indenture  sceptre  tester  fender  injector  jester  peddler  scepter  smelter  welter  censer  ejector  fester  herder  pedlar  pester  renter  welder  abettor  begetter  bender  dredger  erector  fencer  intenser  speller  stepper  vender  vesper  welcher  heckler  shredder  swearer  director  surrender  slender  texture  detector  inspector  offender  semester  cerebellar  connector  defender  gentler  specter  spectre  stretcher  avenger  blender  tempter  dissenter  scarcer  spreader  cleanser  declarer  defector  dismember  spender  trencher  receptor  adventure  collector  condenser  conjecture  splendor  propeller  trimester  distemper  reflector  selector  assembler  centimetre  contender  debenture  dispenser  millimetre  objector  bestseller  epicenter  respecter  sequester  bisector  deflector  dissector  epicentre  nonmember  protector  interstellar  polyester  preceptor  projector  pretender  blasphemer  interceptor  provender  architecture  storyteller  peradventure  misadventure  transgender  carburettor  experimenter  multiplexer