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