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