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