Here's what rhymes with bolster.
                        
                        
                    
                                pollster  holster  upholster  reupholster  Words that almost rhyme with bolster
poster  toaster  boaster  oldster  jolter  older  polar  boulder  bolder  bowler  coaster  dolor  roadster  roaster  boater  bowlder  doter  molter  moulter  over  motor  owner  shoulder  solar  soldier  donor  holder  folder  odor  roller  rotor  voter  colder  oder  poker  ochre  ogre  joker  moulder  poacher  toner  imposter  molder  poser  choker  bloater  boner  hoaxer  doper  droller  goldener  coaxer  moldier  mouldier  lower  closer  sober  bipolar  broker  nobler  beholder  grocer  knower  moder  blower  grosser  kosher  loader  mower  coder  gaoler  goer  gopher  loafer  loner  rover  sower  stoker  stroller  upholder  drover  floater  homer  rower  comber  roper  smolder  smoulder  gofer  loaner  stoner  honer  cajoler  moaner  proner  moper  plonker  gaucher  loather  nosher  closure  slower  promoter  clover  grower  smoker  decoder  imposture  remoter  kroner  kronor  thrower  clothier  cloture  crozier  imposer  paternoster  allover  groper  intoner  exposure  moreover  composer  controller  composure  mediocre  comptroller  encoder  unipolar  proposer  disposer  placeholder  playgoer  flyover  pardoner  provoker  ignobler  nonvoter  disclosure  enclosure  sarcoma  vasomotor  arteriolar  inclosure  locomotor  misnomer  psychomotor  interloper  pawnbroker  officeholder  servomotor  titleholder  snowblower  transpolar  telephoner  racegoer  foreclosure  policyholder  nondisclosure  nonsmoker  moviegoer  marathoner  oculomotor  sensorimotor  overexposure  discomposure  greengrocer  theatregoer  winegrower  concertgoer  flamethrower  underexposure