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