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