Here's what rhymes with avail.
                        
                        
                    
                                fail  sale  sail  veil  hail  shale  vale  assail  hale  faille  male  scale  mail  pale  tail  tale  jail  nail  rail  frail  gale  whale  bail  stale  wail  bale  dale  pail  snail  flail  kale  unveil  wale  trail  email  travail  curtail  inhale  quail  quale  braille  grail  wassail  hightail  lugsail  carrell  detail  prevail  entail  exhale  bewail  derail  gunwale  mainsail  topsail  foresail  impale  taffrail  pigtail  countervail  monorail  bobtail  pellmell  hangnail  fingernail  ponytail  nonpareil  swallowtail  martingale  tattletale