Here's what rhymes with rath.
                        
                        
                    
                                wrath  lath  path  hath  bath  math  aftermath  psychopath  Words that almost rhyme with rath
as  laugh  ash  ass  rash  lash  lass  has  have  half  class  gas  glass  mass  pass  cash  grass  brass  crash  flash  graph  alas  bass  calf  clash  dash  jazz  trash  cache  sash  chaff  hash  mash  slash  bras  brash  crass  gash  thrash  bash  gaff  halve  staff  whereas  smash  splash  harass  amass  giraffe  morass  stash  behalf  surpass  impasse  digraph  hourglass  epitaph  autograph  epigraph  paragraph  photograph  telegraph  monograph  phonograph  fiberglass  lithograph  underclass  holograph  polygraph  sassafras  mimeograph