Here's what rhymes with hardfish.
                        
                        
                    
                                swordfish  Words that almost rhyme with hardfish
varnish  starfish  codfish  shortish  garfish  sharpish  garnish  offish  tarnish  modish  dogfish  dwarfish  hawkish  largish  hoggish  warmish  polish  popish  longish  ravish  smallish  snobbish  crawfish  mawkish  waspish  donnish  blondish  cloddish  abolish  astonish  blokish  accomplish  demolish  admonish  impoverish  schoolmarmish