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