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