Here's what rhymes with casteth.
                        
                        
                    
                                death  breath  neath  shibboleth  Words that almost rhyme with casteth
deaf  chess  less  says  fresh  press  stress  dress  flesh  guess  yes  bless  mess  mesh  rev  chef  ref  abbess  fez  thresh  tress  possess  assess  suppress  afresh  caress  finesse  oppress  abs  cortege  clef  creche  cress  success  express  unless  distress  confess  impress  profess  recess  redress  refresh  repress  acquiesce  coalesce  depress  undress  authoress  egress  digress  sunless  tigress  nonetheless  largesse  reassess  adulteress  dispossess  laundress  sorceress  transgress  letterpress  watercress  nevertheless  depth  tenth  stealth  health  wealth  breadth  length  strength  twelfth  commonwealth