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