Here's what rhymes with thinkith.
                        
                        
                    
                                myth  pith  scythe  writhed  writhe  herewith  smith  therewith  wherewith  forthwith  monolith  silversmith  Words that almost rhyme with thinkith
give  kiss  kith  his  this  with  fish  wish  miss  viz  bis  dish  cliff  dis  sieve  def  diss  hiss  quiz  sis  pis  piss  skiff  whiff  biz  hes  riff  rive  whiz  fizz  shes  tiff  forgive  stiff  abyss  bliss  amiss  sniff  swish  dismiss  outlive  relive  remiss  reminisce  midriff  chandeliers  premiss  jellyfish  hieroglyph  cuttlefish  corroborative  fifth  width  filth  sixth  plinth  hyacinth  labyrinth