Here's what rhymes with slumber.
                        
                        
                    
                                lumber  umber  number  outnumber  encumber  Words that almost rhyme with slumber
under  bumper  jumper  wonder  thunder  hunter  plunder  blunder  plunger  sunder  asunder  rubber  other  summer  upper  lover  utter  ulcer  comer  flutter  rudder  runner  drummer  rougher  tumbler  usher  blubber  plumber  tuber  udder  scrubber  mother  brother  color  cover  suffer  younger  butter  buffer  rupture  sulphur  supper  vulgar  molar  sulfur  butler  cutter  gutter  lustre  shudder  shutter  clutter  gunner  hover  luster  mutter  paler  sucker  tougher  buzzer  duller  erasure  smother  succor  bugger  crusher  muffler  plover  putter  smuggler  sputter  stutter  another  culture  structure  hunger  recover  cluster  ocular  muster  youngster  bunker  ligature  bluster  vulture  duster  juster  discover  sculpture  juncture  sculptor  puncture  uncover  midsummer  coadjutor  premolar  adjuster  embrasure  pustular  tricolor  instructor  restructure  abductor  filibuster  agriculture  conductor  constructor  horticulture  chronometer  rediscover  substructure  undercover  watercolor  superstructure  acupuncture  aquaculture  conjuncture  cartographer  pentameter  infrastructure  counterculture  semiconductor  superconductor