Here's what rhymes with greywacke.
                        
                        
                    
                                shock  hoc  hawk  sock  hock  stock  talk  rock  walk  flock  knock  lock  chalk  cock  dock  mock  stalk  frock  loc  doc  balk  doch  loch  smock  chock  pock  bock  gawk  jock  mach  wok  calk  caulk  choc  schlock  shlock  block  clock  bloc  proc  crock  squawk  restock  unlock  macaque  hollyhock  leafstalk  shoptalk  windsock  manioc  tomahawk  aftershock  overstock  sparrowhawk  hammerlock  backtalk  moonwalk  ballcock  interlock  electroshock  laughingstock  antiknock  poppycock  Words that almost rhyme with greywacke
fog  hog  dog  log  frog  bog  cog  jog  smog  flog  jag  slog  wog  snog  blog  clog  grog  agog  befog  sprog  quahaug  defog  prolog  dialogue  catalogue  analog  synagogue  analogue  epilogue  travelogue  epilog  synagog  unclog  travelog  pettifog  monologue  demagogue  pedagogue  underdog  monolog  pedagog  demagog  fork  shark  hark  honk  dark  mark  park  bark  spark  mosque  pork  stark  torque  cork  lark  barque  marque  porque  stork  manque  dork  bonk  conk  nark  narc  wank  wonk  remark  quark  bronc  embark  oligarch  debark  uncork  patriarch  matriarch  paperbark  reembark  tidemark  fingermark  disembark  watermark  meadowlark