Here's what rhymes with harmonise.
                        
                        
                    
                                niece  peace  piece  cease  lease  apiece  geese  police  grease  obese  crease  fleece  altarpiece  colonise  modernise  cerise  increase  release  recognise  caprice  decease  mortgagees  surcease  legalese  decrease  masterpiece  centerpiece  mantelpiece  revolutionise  antagonise  synchronise  tailpiece  patronise  Words that almost rhyme with harmonise
knees  unease  these  leave  chief  achieve  sees  teeth  fees  leaf  beef  cheese  keys  seas  seize  bees  naive  peas  reef  sheath  thief  weave  appease  wreath  fief  heath  heave  leash  sheaf  teas  tease  massif  sneeze  unleash  chemise  leas  lees  lief  pease  reeve  sheave  tees  wheeze  seethe  hies  pees  quiche  sheathe  wreathe  receive  trees  beneath  brief  please  conceive  grief  perceive  agrees  breathe  breeze  underneath  freeze  motif  sleeve  grieve  pleas  cleave  fleas  frees  frieze  nominees  flees  internees  skis  threes  returnees  bereave  sarees  sleaze  sties  believe  disease  belief  relief  overseas  relieve  deceive  diocese  manganese  retrieve  rupees  squeeze  trainees  unbelief  appointees  dioceses  emphases  attendees  foresees  lessees  licensees  referees  reprieve  mortise  oversees  pastiche  serif  trapeze  dungarees  honeybees  interweave  matinees  nobodies  overleaf  parolees  posies  scrutinise  soirees  sprees  tepees  undeceive  argosies  interleave  manatees  screes  degrees  analyses  guarantees  indices  prestige  trustees  decrees  devotees  parentheses  bequeath  detainees  grandees  grantees  isosceles  retirees  syntheses  absentees  conferees  guaranties  legatees  leitmotif  palsies  amputees  chickpeas  draftees  flyleaf  invitees  abductees  aperitif  baksheesh  cloverleaf  debauchees  debrief  inductees  jubilees  misconceive  pharisees  trochees  expertise  hypotheses  appendices  interviewees  disagrees  disbelieve  displease  addressees  consignees  franchisees  antifreeze  divorcees  escapees  bumblebees  chickadees  enlistees  disbelief  deportees  idiosyncrasies  meets  meats  metes  weeks  chiefs  keeps  seats  seeks  sheets  cheeks  peaks  beats  heaps  feats  heats  leaks  leaps  reefs  antiques  beets  sheaths  wreaths  beaks  cheats  deeps  fiefs  weeps  heaths  jeeps  leeks  peeps  reaps  seeps  sheikhs  sneaks  teats  beeps  massifs  minx  reeks  sheiks  geeks  leafs  peeks  piques  wreaks  speaks  beasts  treats  elites  motifs  feasts  fleets  sleeps  sweeps  sweets  briefs  creeks  creeps  griefs  shrieks  suites  yeasts  competes  conceits  freaks  greets  cleats  deceits  pleats  steeps  obliques  physiques  tweaks  techniques  beliefs  streets  priests  receipts  completes  repeats  defeats  reliefs  retreats  streaks  boutiques  deletes  petites  bequeaths  entreats  squeaks  requites  critiques  bespeaks  sweetmeats  depletes  parakeets  plebiscites  leitmotifs  fifteenths  sixteenths  librettists