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