Here's what rhymes with catalyser.
                        
                        
                    
                                riser  fertilizer  wiser  analyzer  miser  visor  appetizer  atomizer  geyser  kaiser  appetiser  adviser  advisor  advertiser  divisor  colonizer  reviser  baptizer  ionizer  modernizer  atomiser  chastiser  mobilizer  baptiser  unwiser  advertizer  supervisor  incisor  stabilizer  equalizer  sterilizer  economiser  energizer  immobilizer  merchandiser  preciser  breathalyzer  breathalyser  monopolizer  vulgarizer  conciser  pressuriser  fraternizer  organizer  sympathizer  oxidizer  vaporizer  exerciser  improviser  womanizer  pasteurizer  visualizer  harmonizer  pressurizer  tenderizer  improvisor  temporizer  criticizer  eulogizer  pasteuriser  subsidizer  patronizer  plagiarizer  criticiser  alphabetizer  synthesizer  tranquilizer  moisturizer  deodorizer  proselytizer  mesmerizer  moisturiser  proselytiser  humanizer  liquidizer  gormandiser  tranquillizer  philosophizer  Words that almost rhyme with catalyser
lifer  ricer  rifer  driver  cipher  diver  nicer  heifer  cypher  fiver  slicer  fifer  blither  tither  deicer  chicer  survivor  decipher  splicer  skiver  contriver  encipher  writer  lighter  rider  liar  liner  riper  liker  rhymer  righter  aligner  rimer  wrier  aliner  wryer  fire  higher  prior  minor  wire  fiber  wider  buyer  fibre  finer  hire  brighter  fighter  tiger  tire  attire  friar  iiber  miner  primer  sire  tighter  timer  cider  dimer  drier  dryer  hier  hyper  pyre  slider  titer  climber  diaper  diner  flyer  glider  niger  piper  signer  slighter  underwriter  viper  whiter  briar  crier  dyer  flier  miter  wiper  biker  brier  copywriter  hiker  niter  trier  biter  blighter  filer  fryer  nigher  prier  shiner  tiler  viler  assigner  briber  firer  frier  guider  hider  miler  shyer  whiner  applier  direr  piker  fibber  shier  griper  pryer  triter  unriper  desire  acquire  designer  choir  provider  supplier  admirer  binder  milder  spider  finder  kinder  wilder  defire  divider  diviner  grinder  sniper  refiner  striker  minder  reciter  sublimer  blinder  decider  definer  shyster  reviler  rewire  rhymester  defiler  whitener  ratifier  twiner  decliner  snider  spryer  limier  rapider  eviler  sprier  lucider  entire  require  amplifier  compiler  outsider  reminder  multiplier  classifier  insider  occupier  exciter  qualifier  pacifier  recliner  backslider  combiner  croupier  describer  surefire  inciter  barbwire  cosigner  notifier  grimier  imbiber  sicklier  slimier  unkinder  vivider  pricklier  raspier  soupier  kitschier  humider  enquire  subscriber  conspire  inquirer  rectifier  ceasefire  quantifier  enquirer  purifier  transpire  magnifier  sandpiper  transcriber  versifier  misfire  fortifier  moonshiner  spitfire  childminder  sweetbriar  sweetbrier  testifier  inscriber  crispier  firelighter  wispier  crinklier  wrinklier  identifier  signifier  emulsifier  rangefinder  falsifier  beautifier  microfiber  faultfinder  splendider  intensifier  humidifier  electrifier